2022/03/04 更新

写真a

ウチヤマ トモミ
内山 知実
UCHIYAMA, Tomomi
所属
未来材料・システム研究所 材料創製部門 教授
大学院担当
大学院情報科学研究科
大学院情報学研究科
職名
教授
連絡先
メールアドレス

学位 2

  1. 工学修士

  2. 博士(工学)

研究キーワード 3

  1. 混相流工学

  2. 流体工学

  3. 計算流体力学

研究分野 3

  1. その他 / その他  / 工学@機械工学@流体工学

  2. その他 / その他  / 複合領域@エネルギー学@エネルギー学一般

  3. その他 / その他  / 複合領域@情報科学@知能情報学

現在の研究課題とSDGs 1

  1. 小型水力発電装置の開発と社会実装

経歴 1

  1. エコトピア科学研究所 教授

    2009年4月

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    国名:日本国

学歴 2

  1. 名古屋大学   工学研究科   機械工学

    - 1987年

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    国名: 日本国

  2. 名古屋大学   工学部   機械工学

    - 1985年

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    国名: 日本国

所属学協会 4

  1. 日本機械学会

  2. 日本混相流学会

  3. 粉体工学会

  4. ターボ機械協会

受賞 8

  1. 日本計算数理工学会 論文賞

    2018年9月   日本計算数理工学会   熱流動解析に対する境界条件強制型Smoothed Profile-Lattice Boltzmann

    瀬田剛,内山知実,高野登

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    受賞区分:国内学会・会議・シンポジウム等の賞  受賞国:日本国

  2. APT Dsitinguished Paper Award

    2011年5月   粉体工学会  

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    受賞国:日本国

  3. (財)ホソカワ粉体工学振興財団 研究奨励賞

    2007年1月   (財)ホソカワ粉体工学振興財団  

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    受賞国:日本国

  4. 日本混相流学会 論文賞

    2003年7月   日本混相流学会  

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    受賞区分:国内学会・会議・シンポジウム等の賞  受賞国:日本国

  5. The Water Arbitration Prize

    2003年7月   The Institution of Mechanical Engineers  

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    受賞区分:国際学会・会議・シンポジウム等の賞 

  6. 日本混相流学会 奨励賞

    1998年7月   日本混相流学会  

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    受賞区分:国内学会・会議・シンポジウム等の賞  受賞国:日本国

  7. 日本機械学会 奨励賞

    1998年4月   日本機械学会  

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    受賞区分:国内学会・会議・シンポジウム等の賞  受賞国:日本国

  8. 日本機械学会 畠山賞

    1987年3月   日本機械学会  

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    受賞区分:国内学会・会議・シンポジウム等の賞  受賞国:日本国

▼全件表示

 

論文 268

  1. Air-water interface dynamics and energy transition in air of a sphere passed vertically upward through the interface

    Takamure K., Uchiyama T.

    EXPERIMENTAL THERMAL AND FLUID SCIENCE   118 巻   2020年10月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Experimental Thermal and Fluid Science  

    The water exit problem is a fundamental problem in fluid dynamics, and the behavior of the air–water interface and the energy transition of an object exiting water have not been thoroughly investigated. In this study, a solid sphere with a density of 2.64×103kg/m3 and diameter of d=25.4 mm was launched vertically upward in water toward the air–water interface. The motion of the sphere and the behavior of the interface were investigated for varying submergence depths H from the launch position of the sphere to the interface. The launch velocity was set so that the Reynolds number immediately after the sphere passed the air–water interface was about 3000 for all cases of H. The kinetic and potential energies of the sphere and the energy lost because of the air–water interface (i.e., interfacial containing energy) were estimated based on the classical law of energy conservation. For H/d⩽3, the ratio between the kinetic energy immediately after passing through the air–water interface and the potential energy at the maximum displacement position decreases with increasing H, but this energy ratio takes a constant value of 0.57 for H/d⩾4. Additionally, for H/d⩾4, kinetic energy is transformed to potential energy and interfacial containing energy at a fixed ratio for each vertical position. The spreading characteristics of the water mass after the sphere has passed the air–water interface and the thickness and width of the interfacial water sheet when the top of the sphere reached the calm free surface were investigated by focusing on their relationship to the energy distribution. For H/d⩾4, where the energy ratio takes a constant value, the increase in the rate of spread of the water mass with increasing H/d is clearly smaller than that of H/d⩽4. Furthermore, for H/d⩾4, the ratio between the thickness and width of the interfacial water sheet is constant. In other words, in the region where the ratio between the kinetic energy of the sphere immediately after passing through the air–water interface and the potential energy at the maximum displacement position has a constant value, the shape of the interfacial water sheet is self-similar. These findings contribute to the determination of variable parameters when modeling the water exit problem.

    DOI: 10.1016/j.expthermflusci.2020.110167

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  2. Numerical simulations of the flow and performance of a hydraulic Savonius turbine by the vortex in cell method with volume penalization

    Uchiyama Tomomi, Gu Qiang, Degawa Tomohiro, Iio Shouichiro, Ikeda Toshihiko, Takamure Kotaro

    RENEWABLE ENERGY   157 巻   頁: 482 - 490   2020年9月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Renewable Energy  

    This study is concerned with the numerical simulations of the flow and performance of a rotor of a hydraulic Savonius turbine. The flow was simulated using the vortex in cell (VIC) method in combination with the volume penalization (VP) method. The torque acting on the rotor was computed using a custom method, which can accurately calculate the fluid forces on solid bodies in flows simulated by the VIC-VP method, to analyze the rotational speed and power output of the rotor. The simulated flow around the rotating blades agreed qualitatively with the experimentally visualized flow, and the analyzed relation between the rotor's rotational speed and power output agreed with the experimentally measured relation. These demonstrate that the VIC-VP method in combined with the authors’ method for calculating fluid forces is applicable for the simulations of flow and performance of hydraulic Savonius turbines.

    DOI: 10.1016/j.renene.2020.05.001

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  3. Energy transition in air of a sphere launched vertically upward in water

    Takamure K., Uchiyama T.

    OCEAN ENGINEERING   207 巻   2020年7月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Ocean Engineering  

    In a present experiment, a solid sphere with a density of 2.64 × 103 kg/m3 and diameter of 25.4 mm was launched vertically upward in water toward the air–water interface. The submergence depth was changed and the launch velocity was adjusted so that the Reynolds number of the sphere immediately after passing the air–water interface was almost equal at each submergence depth. The effects of the submergence depth on the motion of the sphere and behavior of the air–water interface were investigated, which indicated that the Reynolds number immediately after the sphere passed through the air–water interface was Re¯w1∼3000 at all submergence depths (1.0d≤H≤6.0d; d is the diameter of the sphere and H is the submergence depth). The experimental values of the maximum displacement position were always smaller than the theoretical values owing to the energy dispersion caused by the water droplets entrained around the sphere. When the submergence depth was H∕d<3, the higher the submergence depth, the smaller was the rise of the sphere after passing through the air–water interface. However, when the submergence depth was H∕d≥3, the temporal changes in the vertical trajectory of the sphere were approximately equal. The energy ratio Ep∕Ek was defined as the ratio of the kinetic energy Ek of the sphere immediately after it passed through the air–water interface to the potential energy Ep when the sphere reached the maximum displacement position. Ep∕Ek decreased when the submergence depth was H∕d<3; however, it had a constant value of Ep∕Ek∼0.57±0.05 when the submergence depth was H∕d≥3. In addition, when the submergence depth was H∕d≥3, the ratio of each energy (kinetic energy, potential energy, and interfacial energy) became similar immediately after passing through the water surface. This indicated that each energy distribution had reached the equilibrium state. These findings contribute to the determination of variable parameters when modeling the water exit problem.

    DOI: 10.1016/j.oceaneng.2020.107426

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  4. Dynamics of impact cratering on granular bed by hydrogel sphere

    Matsuda Yu, Kamiya Ryota, Yamaguchi Hiroki, Uchiyama Tomomi

    PHYSICS OF FLUIDS   32 巻 ( 6 )   2020年6月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Physics of Fluids  

    A lot of studies on the dynamics of a granular impact cratering by a liquid drop have been carried out. However, the results so far are controversial due to the complex impact dynamics of a liquid drop, such as deformation, splash, and penetration into the granular bed. In this study, we focused on the dynamics of the granular impact cratering by a hydrogel sphere, which deforms without splashing and penetrating. We investigated the maximal deformation time of the sphere and the lift-off time of the grains. Both the maximal deformation time and the lift-off time are similar to each other and depend on the -1/2 power of the Young's modulus of the hydrogel sphere. This power law of the maximum deformation time is the same as an impact of a gel sphere on a flat solid surface. The angle of the ejected curtain was evaluated. The angle is larger for the impact with small deformation of the sphere than that for the impact with large deformation, and the angle is less dependent on the free-fall height. We also investigated the distributions of the ejected grains using the grains dyed by a fluorescent dye. The distribution was visualized by the fluorescent images captured before and after the impact. At the crater rim, the number of the dyed grains flying to and away are balanced. The number of the dyed grains gathered at the dimensionless distance from the crater center of 1.15, where the distance is nondimensionalized by the crater radius, is the largest. This maximum value for the number of the gathered grains is larger for the impact with small deformation than that with large deformation. This result is consistent with the dependence of the impact mode on the angle of the ejected curtain.

    DOI: 10.1063/5.0011406

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  5. Motion of a spherical particle in a microbubble plume and the behavior of microbubbles around the particle

    Uchiyama Tomomi, Kawasaki Yujiro, Degawa Tomohiro, Takamure Kotaro

    PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART C-JOURNAL OF MECHANICAL ENGINEERING SCIENCE   234 巻 ( 7 ) 頁: 1340 - 1350   2020年4月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science  

    This study aims to investigate the motion of a solid spherical particle in a microbubble plume and the behavior of bubbles around the particle. Microbubbles (mean diameter 0.037 mm) released into a rectangular conduit by the electrolysis of water rise via buoyancy and form a bubble plume in the conduit. A solid spherical particle with a diameter of 10 mm and density of 1022 kg/m3 is placed on a mesh stretched across the cross-section near the bottom of the conduit, and microbubbles are then released from the cathode. Experiments are conducted with the bubble volumetric flux in the conduit j G at 0.05 and 0.09 mm/s. The particle repeatedly rises and falls when j G = 0.05 mm/s, and it rises almost vertically when j G = 0.09 mm/s. The absolute value of the vertical velocity of the particle is lower than that of the bubble. There is a belt-like region where the bubble velocity is extremely lower behind the particle. Such wake behind the particle clearly appears when the particle is falling, because the bubble velocity relative to the particle is higher.

    DOI: 10.1177/0954406219893000

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  6. Numerical simulation of bubbly flow around a cylinder by semi-Lagrangian-Lagrangian method

    Van Luc Nguyen, Degawa Tomohiro, Uchiyama Tomomi, Takamure Kotaro

    INTERNATIONAL JOURNAL OF NUMERICAL METHODS FOR HEAT & FLUID FLOW   29 巻 ( 12 ) 頁: 4660 - 4683   2019年12月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:International Journal of Numerical Methods for Heat and Fluid Flow  

    Purpose: The purpose of this study is to design numerical simulations of bubbly flow around a cylinder to better understand the characteristics of flow around a rigid obstacle. Design/methodology/approach: The bubbly flow around a circular cylinder was numerically simulated using a semi-Lagrangian–Lagrangian method composed of a vortex-in-cell method for the liquid phase and a Lagrangian description of the gas phase. Additionally, a penalization method was applied to account for the cylinder inside the flow. The slip condition of the bubbles on the cylinder’s surface was enforced, and the outflow conditions were applied to the liquid flow at the far field. Findings: The simulation clarified the characteristics of a bubbly flow around a circular cylinder. The bubbles were shown to move around and separate from both sides of the cylinder, because of entrainment by the liquid shear layers. Once the bubbly flow fully developed, the bubbles distributed into groups and were dispersed downstream of the cylinder. A three-dimensional vortex structure of various scales was also shown to form downstream, whereas a quasi-stable two-dimensional vortex structure was observed upstream. Overall, the proposed method captured the characteristics of a bubbly flow around a cylinder well. Originality/value: A semi-Lagrangian–Lagrangian approach was applied to simulate a bubbly flow around a circular cylinder. The simulations provided the detail features of these flow phenomena.

    DOI: 10.1108/HFF-03-2019-0227

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  7. Numerical simulation of fluid forces on moving solid body by the vortex in cell method with volume penalization

    Degawa Tomohiro, Gu Qiang, Uchiyama Tomomi, Takamure Kotaro

    AEROSPACE SCIENCE AND TECHNOLOGY   94 巻   2019年11月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Aerospace Science and Technology  

    This study proposes a method for calculating the fluid forces acting on moving solid bodies in flows simulated by the vortex in cell (VIC) method. The body is represented using the volume penalization (VP) method, which introduces the influence of the body on the flow as an external force in the form of a penalization term into the Navier-Stokes equation. The pressure field is computed by solving the Poisson equation, which is derived by taking the divergence of the Navier-Stokes equation. The pressure and viscous stress on the body surface are calculated using a quadratic function along the vector normal to the surface. This study simulates the flow around a cylinder oscillating in still water by the VIC-VP method, and calculates the fluid forces acting on the cylinder using the proposed method. The velocity profiles on four cross-sections at three different time points agree well with the results of a measurement. The in-line force acting on the cylinder also agrees with the existing results computed by a boundary-conforming formulation. These demonstrate the validity of the authors' method for calculating the fluid forces on solid bodies in flows simulated by the VIC-VP method.

    DOI: 10.1016/j.ast.2019.105360

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  8. Deformation of a vortex ring caused by its impingement on a sphere

    Van Luc Nguyen, Takamure Kotaro, Uchiyama Tomomi

    PHYSICS OF FLUIDS   31 巻 ( 10 )   2019年10月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Physics of Fluids  

    The deformation of a vortex ring caused by its impingement on a sphere was numerically investigated using a proposed vortex-in-cell method. The method was validated by simulation of the collision of a vortex ring with a rigid planar surface and proved to be most satisfactory in the analysis of the dynamics of a vortex structure. In a coaxial collision, the behavior of the vortex structure is similar to that in the case of a planar surface. A secondary vortex ring is formed owing to the separation of the boundary layers on the sphere, caused by the effect of the primary vortex ring. The interaction between the secondary and primary vortex rings plays an important role in the dynamics of the vortex structure when the secondary vortex ring is completely formed. In a noncoaxial collision, the structure of the secondary vortex is moderately different from that in the coaxial collision. Moreover, the vortex structure in the coaxial collision is two-dimensional, in which the vorticity field is dominated by two transverse components, whereas that in the noncoaxial collision is three-dimensional. The total kinetic energy in both the cases decreases gradually during the entire period of evolution, whereas the enstrophy reduces in the early stage, then increases considerably, before a gradual reduction in the final stage. The enstrophy reaches a peak when the secondary vortex ring is completely formed, at which stage the effects of vortex stretching and vorticity production at the solid boundary are higher than that of vortex diffusion.

    DOI: 10.1063/1.5122260

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  9. Numerical simulation of the interaction between a vortex ring and a bubble plume

    Van Luc Nguyen, Degawa Tomohiro, Uchiyama Tomomi

    INTERNATIONAL JOURNAL OF NUMERICAL METHODS FOR HEAT & FLUID FLOW   29 巻 ( 9 ) 頁: 3192 - 3224   2019年9月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:International Journal of Numerical Methods for Heat and Fluid Flow  

    Purpose: This paper aims to provide discussions of a numerical method for bubbly flows and the interaction between a vortex ring and a bubble plume. Design/methodology/approach: Small bubbles are released into quiescent water from a cylinder tip. They rise under the buoyant force, forming a plume. A vortex ring is launched vertically upward into the bubble plume. The interactions between the vortex ring and the bubble plume are numerically simulated using a semi-Lagrangian–Lagrangian approach composed of a vortex-in-cell method for the fluid phase and a Lagrangian description of the gas phase. Findings: A vortex ring can transport the bubbles surrounding it over a distance significantly depending on the correlative initial position between the bubbles and the core center. The motion of some bubbles is nearly periodic and gradually extinguishes with time. These bubble trajectories are similar to two-dimensional-helix shapes. The vortex is fragmented into multiple regions with high values of Q, the second invariant of velocity gradient tensor, settling at these regional centers. The entrained bubbles excite a growth rate of the vortex ring's azimuthal instability with a formation of the second- and third-harmonic oscillations of modes of 16 and 24, respectively. Originality/value: A semi-Lagrangian–Lagrangian approach is applied to simulate the interactions between a vortex ring and a bubble plume. The simulations provide the detail features of the interactions.

    DOI: 10.1108/HFF-12-2018-0734

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  10. Numerical simulation of annular bubble plume by vortex in cell method

    Van Luc Nguyen, Degawa Tomohiro, Uchiyama Tomomi

    INTERNATIONAL JOURNAL OF NUMERICAL METHODS FOR HEAT & FLUID FLOW   29 巻 ( 3 ) 頁: 1103 - 1131   2019年3月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:International Journal of Numerical Methods for Heat and Fluid Flow  

    Purpose: This study aims to provide discussions of the numerical method and the bubbly flow characteristics of an annular bubble plume. Design/methodology/approach: The bubbles, released from the annulus located at the bottom of the domain, rise owing to buoyant force. These released bubbles have diameters of 0.15–0.25 mm and satisfy the bubble flow rate of 4.1 mm3/s. The evolution of the three-dimensional annular bubble plume is numerically simulated using the semi-Lagrangian–Lagrangian (semi-L–L) approach. The approach is composed of a vortex-in-cell method for the liquid phase and a Lagrangian description of the gas phase. Findings: First, a new phenomenon of fluid dynamics was discovered. The bubbly flow enters a transition state with the meandering motion of the bubble plume after the early stable stage. A vortex structure in the form of vortex rings is formed because of the inhomogeneous bubble distribution and the fluid-surface effects. The vortex structure of the flow deforms as three-dimensionality appears in the flow before the flow fully develops. Second, the superior abilities of the semi-L–L approach to analyze the vortex structure of the flow and supply physical details of bubble dynamics were demonstrated in this investigation. Originality/value: The semi-L–L approach is applied to the simulation of the gas–liquid two-phase flows.

    DOI: 10.1108/HFF-03-2018-0094

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  11. FLOW PAST TWO CYLINDERS ARRANGED IN TANDEM WITHIN A MICROBUBBLE PLUME

    Uchiyama Tomomi, Kano Ryota, Degawa Tomohiro, Takamure Kotaro

    PROCEEDINGS OF THE ASME/JSME/KSME JOINT FLUIDS ENGINEERING CONFERENCE, 2019, VOL 5     頁: .   2019年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

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  12. EXPERIMENTAL STUDY OF MIXING OF TWO-LAYER DENSITY-STRATIFIED FLUID BY A VORTEX RING

    Cao Lile, Ito Ryo, Degawa Tomohiro, Matsuda Yu, Takamure Kotaro, Uchiyama Tomomi

    PROCEEDINGS OF THE ASME/JSME/KSME JOINT FLUIDS ENGINEERING CONFERENCE, 2019, VOL 5     頁: .   2019年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

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  13. Development of a propeller-type hollow micro-hydraulic turbine with excellent performance in passing foreign matter 査読有り

    Uchiyama, T., Honda, S. and Degawa, T.

    Renewable Energy   126 巻   頁: 545-551   2018年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

    DOI: https://doi.org/10.1016/j.renene.2018.03.083

  14. Numerical simulation of jet issuing diagonally upward into density-stratified fluid in cylindrical tank 査読有り

    Degawa, T., Uchiyama, T., Aozasa, I., Ishikawa, A. and Motoyama, K.

    J. Power and Energy Eng.   6 巻 ( 3 ) 頁: 38-52   2018年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

  15. Smoothed profile-lattice Boltzmann method for non-penetration and wetting boundary conditions in two and three dimensions

    Seta T.

    Computers and Fluids   159 巻   頁: 64 - 80   2017年12月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Computers and Fluids  

    DOI: 10.1016/j.compfluid.2017.09.012

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  16. Control of air bubble cluster by a vortex ring launched into still water 査読有り

    Uchiyama, T., Kusamichi, S.

    Int. J. Chemical Engineering and Applications   8 巻 ( 1 ) 頁: 37-46   2017年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  17. Generation and transport of solid particle clusters using a vortex ring launched into water 査読有り

    Uchiyama, T., Yano, C., and Degawa, T.

    Int. J. Chemical Engineering and Applications   8 巻 ( 4 ) 頁: 253-260   2017年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  18. Behavior of a jet issuing diagonally upward into two-layer density-stratified fluid in a cylindrical tank 査読有り

    Degawa, T., Fukue, S., Uchiyama, T., Ishikawa, A., and Motoyama, K.

    J. Flow Control, Measurement & Visualization   5 巻   頁: 51-64   2017年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

  19. Study of the interactions between rising air bubbles and vortex core of swirling water flow around vertical axis 査読有り

    Chemical Engineering Science   142 巻   頁: 137-143   2016年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  20. Numerical simulation of the interactions between a vortex ring and solid particles suspended above a horizontal wall 査読有り

      301 巻   頁: 966-980   2016年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  21. Experimental study of flow around a circular cylinder inside a bubble plume 査読有り

    Uchiyama, T., Ishiguro, Y.

    Advances in Chem. Eng. Sci.   6 巻   頁: 269-280   2016年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  22. A feasibility study of power generation from sewage using a hollowed pico-hydraulic turbine 査読有り

    Uchiyama, T., Honda, T., Okayama, T. and Degawa, T.

    Engineering   2 巻   頁: 510-517   2016年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  23. Effects of clearance between rotor and ground on the performance of an open cross-flow-type nano-hydraulic turbine 査読有り

    Uchiyama, T., Mizoguchi, S., Iio, S., Katayama, Y. and Ikeda, T.

    J. Energy and Power Engineering   10 巻   頁: 465-473   2016年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  24. Numerical study on the flow and performance of an open cross-flow mini-hydraulic turbine 査読有り

    Uchiyama, T., Uehara, S., Fukuhara, H., Iio, S. and Ikeda, T.

    J. Power and Energy, Proc. IMechE Part A   229 巻 ( 8 ) 頁: 968-977   2015年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  25. Direct numerical simulation of a turbulent channel flow by an improved vortex in cell method 査読有り

    Uchiyama, T., Yoshii, Y. and Hamada, H.

    Int. J. Numerical Methods for Heat and Fluid Flow   24 巻   頁: 103-123   2014年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  26. Numerical simulation of water flow through nano-hydraulic turbine driven by rapid and shallow stream 査読有り

    Uchiyama, T., Uehara, S., Iio, S., Ikeda, T., and Ide, Y.

    J. Energy and Power Engineering   8 巻   頁: 1663-1672   2014年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  27. Numerical simulation of bubble cluster induced flow by three-dimensional vortex-in-cell method 査読有り

    Chen, B., Wang, Z. and Uchiyama, T.

    Trans. ASME, J. Fluids Eng.   136 巻   頁: 081301-1 - 081301-16   2014年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

  28. Numerical simulation of the interactions between a vortex pair and solid particles near a wall 査読有り

    Uchiyama, T. and Shimada, S.

      257 巻   頁: 55-67   2014年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  29. Numerical simulation of particle-laden gas flow by vortex in cell method 査読有り

    Uchiyama, T.

    Powder Technology   235 巻   頁: 376-385   2013年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  30. Interaction of bubbles with vortex ring launched into bubble plume 査読有り

    Uchiyama, T. and Kusamichi, S.

    Advances in Chemical Engineering and Science   3 巻   頁: 207-217   2013年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  31. Numerical simulation of the interaction between vortex ring and bubble plume 査読有り

    Wang, Z., Uchiyama, T. and Chen, B.

    Applied Mathematical Modelling   37 巻   頁: 10007-10026   2013年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

  32. Numerical Simulation of Interaction between a Vortex Ring and Gas Bubbles 査読有り

    Uchiyama, T.

    Fortschritt-Berichte VDI   3 巻 ( 929 ) 頁: 36-50   2012年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  33. Numerical Simulation for the Transport of Solid Particles with a Vortex Ring 査読有り

    Yagami, H. and Uchiyama, T.

    Advanced Powder Technology   22 巻   頁: 115-123   2011年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

  34. Vortex in Cell法による平行平板間乱流の直接数値シミュレーション 査読有り

    内山知実,濱田廣貴,吉井佑太郎

    日本機械学会論文集B編   77 巻 ( 777 ) 頁: 1178-1188   2011年

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    担当区分:筆頭著者   記述言語:日本語   掲載種別:研究論文(学術雑誌)  

  35. 非圧縮性流れ解析に対するVortex in Cell法の改良 査読有り

    内山知実,吉井佑太郎

    日本機械学会論文集B編   77 巻 ( 775 ) 頁: 1178-1188   2011年

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    担当区分:筆頭著者   記述言語:日本語   掲載種別:研究論文(学術雑誌)  

  36. Numerical Simulation of a Turbulent Channel Flow by Vortex Method 査読有り

    Uchiyama, T., Hamada, H. and Yoshii, Y.

    Proc. 5th International Conference on Vortex Flows and Vortex Models   CD-ROM 巻   2010年11月

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  37. Vortex Simulation for Dispersed Gas-Liquid Two-Phase Flows 招待有り 査読有り

    Uchiyama, T.

    Proc. 5th International Conference on Vortex Flows and Vortex Models   CD-ROM 巻   2010年11月

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    担当区分:筆頭著者   記述言語:英語  

  38. 三次元渦法による気泡流の数値解析 査読有り

    内山知実・松村彰士

    日本機械学会論文集B編   76 巻 ( 762 ) 頁: 211-218   2010年

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    担当区分:筆頭著者   記述言語:日本語   掲載種別:研究論文(学術雑誌)  

  39. Three-Dimensional Vortex Method for the Simulation of Bubbly Flow 査読有り

    Uchiyama, T. and Matsumura, S.

    Trans. ASME, J. Fluids Eng.   132 巻   頁: 101402-1 - 101402-8   2010年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  40. Numerical Simulation for Bubbly Flow by Three-Dimensional Vortex Method 査読有り

    Uchiyama, T. and Matsumura, S.

    Proc. 3rd International Conference on Jets, Wakes and Separated Flows   CD-ROM 巻   2010年

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    担当区分:筆頭著者   記述言語:英語  

  41. 固体粒子が付加された低Reynolds数気相噴流の渦法解析 招待有り 査読有り

    八神寿徳・内山知実

    日本機械学会論文集B編   76 巻 ( 766 ) 頁: 953-960   2010年

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)  

  42. Numerical Simulation for the Transport of Solid Particles with a Vortex Ring 査読有り

    Uchiyama, T. and Yagami, H.

    Proc. World Congress on Particle Technology   CD-ROM 巻   2010年

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    担当区分:筆頭著者   記述言語:英語  

  43. 渦法による非蒸発噴霧流の数値解析 査読有り

    内山知実

    日本混相流学会会誌   23 巻 ( 5 ) 頁: 507-514   2010年

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    担当区分:筆頭著者   記述言語:日本語   掲載種別:研究論文(学術雑誌)  

  44. 固気二相流に対する三次元グリッドフリー渦法 査読有り

    内山知実,成瀬正章

    日本機械学会論文集B編   75 巻 ( 750 ) 頁: 219-226   2009年

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    担当区分:筆頭著者   記述言語:日本語   掲載種別:研究論文(学術雑誌)  

  45. *Numerical Simulation of Non-Evaporating Spray Jet by Vortex Method 査読有り

    Uchiyama, T.

    Atomization and Sprays   19 巻 ( 10 ) 頁: 917-928   2009年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  46. Behavior of a Vortex Ring Launched into Annular Bubble Plume 査読有り

    Uchiyama, T. and Igarashi, K.

    Proc. 6th Pacific Symposium on Flow Visualization and Image Processing   on CD-ROM 巻   2009年

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    担当区分:筆頭著者   記述言語:英語  

  47. Vortex Simulation for Non-axisymmetric Collision of a Vortex Ring with Solid Particles 査読有り

    Uchiyama, T. and Yagami, H.

    Advanced Powder Technology   20 巻   頁: 447-454   2009年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  48. Vortex Simulation of Bubble Plume around a Rectangular Cylinder 査読有り

    Uchiyama, T. and Degawa, T.

    Int. J. Transport Phenomena   11 巻 ( 3 ) 頁: 219-232   2009年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  49. Numerical Simulation of Low Reynolds Number Particle-Laden Gas Jet by Vortex Method 査読有り

    Uchiyama, T. and Yagami, H

    J. Fluid Science and Technology   4 巻 ( 2 ) 頁: 335-347   2009年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  50. Numerical Simulation of Particle-Laden Gas Jet by Lagrangian Method 招待有り 査読有り

    Tomomi Uchiyama

    Proc. 2nd Int. Conf. Jets, Wakes and Separated Flows     頁: on CD-ROM   2008年9月

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    担当区分:筆頭著者   記述言語:英語  

  51. Vortex Simulation of Low Reynolds Number Gas Jet Laden with Solid Particles 査読有り

    Tomomi Uchiyama, Hisanori Yagami

    Proc. 2nd Int. Conf. Jets, Wakes and Separated Flows     頁: on CD-ROM   2008年9月

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    担当区分:筆頭著者   記述言語:英語  

  52. 渦法を用いた固気二相流の二次元グリッドフリー解法 査読有り

    内山知実,成瀬正章

    日本機械学会論文集B編   74 巻 ( 742 ) 頁: 1324-1331   2008年6月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)  

  53. Numerical Simulation for Unaxisymmetric Collision of a Vortex Ring with Solid Particles 査読有り

    Tomomi Uchiyama, Hisanori Yagami

    Proc. 4th Int. Conf. Vortex Flows and Vortex Models     頁: on CD-ROM   2008年4月

     詳細を見る

    記述言語:英語  

  54. *Numerical Simulation for the Collision between a Vortex Ring and Solid Particles 査読有り

    Tomomi Uchiyama, Hisanori Yagami

    Powder Technology   188 巻   頁: 73-80   2008年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  55. 渦輪による固体粒子群の輸送の数値シミュレーション 査読有り

    八神寿徳,内山知実

    粉体工学会誌   45 巻 ( 12 ) 頁: 827-834   2008年

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)  

  56. Particle Simulation of the Plume Diffusion Field around a Circular Cylinder 査読有り

    Uchiyama, T. Yagami, H. and Sugiyama, M.

    Int. J. Modelling and Simulation   28 巻 ( 3 ) 頁: 323-328   2008年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  57. Numerical Simulation of Bubbly Flow around Two Tandem Square-Section Cylinders by Vortex Method 査読有り

    Tomomi Uchiyama, Tomohiro Degawa

    J. Mechanical Engineering Science   222 巻 ( 2 ) 頁: 225-234   2008年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

  58. Two-Dimensional Vortex Simulation of Particulate Air Flow Induced by Free Falling Particles 査読有り

    Tomomi Uchiyama, Masaaki Naruse

    Int. J. Engineering Systems Modelling and Simulation   1 巻 ( 1 ) 頁: 30-38   2008年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

  59. Numerical Simulation of Plane Bubble Plume by Vortex Method 査読有り

    Tomomi Uchiyama, Tomohiro Degawa

    J. Mechanical Engineering Science   222 巻 ( 7 ) 頁: 1193-1201   2008年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

  60. Numerical Simulation for the Transport of Solid Particles with a Vortex Ring 査読有り

    Hisanori Yagami, Tomomi Uchiyama

    Proc. Int. Sympo. EcoTopia Science 2007   on CD-ROM 巻   2007年11月

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    記述言語:英語  

  61. Vortex Simulation of the Bubbly Flow around a Hydrofoil 査読有り

    Tomohiro Degawa, Tomomi Uchiyama

    Proc. 9th Int. Conf. Fluid Machinery   on CD-ROM 巻   2007年10月

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    記述言語:英語  

  62. Numerical Simulation of Plane Mixing Layer by Three-Dimensional Vortex Method 査読有り

    Hisanori Yagami, Tomomi Uchiyama

    Int. J. Turbo & Jet Engines   24 巻   頁: 93-101   2007年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

  63. Vortex Simulation of the Bubbly Flow around a Hydrofoil 査読有り

    Tomomi Uchiyama, Tomohiro Degawa

    Int. J. Rotating Machinery   2007 巻   頁: 9   2007年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  64. Numerical Prediction for the Bubbly Flow around a Hydrofoil by Vortex Method 査読有り

    Uchiyama,T. and Degawa, T.

    Proc. 5th Joint ASME/JSME Fluid Eng. Conf.   on CD-ROM 巻   2007年

     詳細を見る

    担当区分:筆頭著者   記述言語:英語  

  65. Numerical Study on a Compound Round Jet Controlled by Loading Solid Particles 査読有り

    Uchiyama, T. and Fukase, A.

    Int. J. Transport Phenomena   9 巻   頁: 19-32   2007年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

  66. 角柱周りの気泡プルームの渦法解析 査読有り

    出川智啓,内山知実

    混相流研究の進展2     頁: 149-156   2007年

     詳細を見る

    記述言語:日本語   掲載種別:研究論文(学術雑誌)  

  67. 渦輪と固体粒子群の干渉の数値解析 査読有り

    八神寿徳,内山知実

    混相流研究の進展2     頁: 181-188   2007年

     詳細を見る

    記述言語:日本語   掲載種別:研究論文(学術雑誌)  

  68. 渦法による平面気泡プルームの数値解析 査読有り

    出川智啓,内山知実

    日本機械学会論文集B編   73 巻 ( 727 ) 頁: 703-710   2007年

     詳細を見る

    記述言語:日本語   掲載種別:研究論文(学術雑誌)  

  69. Numerical Visualization for the Collision of a Vortex Ring with Solid Particles 査読有り

    Uchiyama, T. and Yagami, H.

    Proc. 6th Pacific Sympo. Flow Visualization and Image Processing   on CD-ROM 巻   2007年

     詳細を見る

    担当区分:筆頭著者   記述言語:英語  

  70. Numerical Simulation of Bubbly Flow around a Pair of Tandem Square Cylinders by Vortex Method 査読有り

    Degawa, T. and Uchiyama, T.

    Proc. 6th Int. Conf. Multiphase Flow   on CD-ROM 巻   2007年

     詳細を見る

    記述言語:英語  

  71. Vortex Simulation for the Interaction between a Vortex Ring and Solid Particles 査読有り

    Uchiyama, T. and Yagami, H.

    Proc. 6th Int. Conf. Multiphase Flow   on CD-ROM 巻   2007年

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    担当区分:筆頭著者   記述言語:英語  

  72. Numerical Simulation for the Collision of a Vortex Ring with Solid Particles 査読有り

    Yagami, H. and Uchiyama, T.

    Proc. 5th Joint ASME/JSME Fluid Eng. Conf.   on CD-ROM 巻   2007年

     詳細を見る

    記述言語:英語  

  73. Measurement for Individual Gas-Liquid Two-Phase Flow Rates Based on Stochastic Features of Differential Pressure Fluctuation 査読有り

    Uchiyama, T., Tominaga, H. and Minemura, K.

    Proc. 5th Joint ASME/JSME Fluid Eng. Conf.   on CD-ROM 巻   2007年

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    担当区分:筆頭著者   記述言語:英語  

  74. Three-dimensional vortex simulation of particle-laden air jet 査読有り

    Uchiyama, T. and Fukase, A.

      61 巻   頁: 1767-1778   2006年1月

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  75. Three-dimensional vortex simulation for particulate jet generated by free falling particles 査読有り

    Uchiyama, T. and Naruse, M.

    Chemical Engineering Science   61 巻   頁: 1913-1921   2006年1月

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

    The particulate jet generated by solid particles falling from a circular orifice into an unbounded quiescent air is simulated. The three-dimensional vortex method, proposed for the analysis of particle-laden free turbulent flow in a prior study, is employed for the simulation. It is found that the falling particles induce complicated three-dimensional unsteady air flow involving large-scale eddies.
    The air takes its maximum velocity at the jet centerline,
    and the velocity profile satisfies the self-similarity around the centerline. The effect of particle diameter on the velocity distribution for the two phases is ivestigated. The entrained air flow rate is favorably compared with the value predicted by the analytical models.

  76. *Numerical Simulation of Reacting Plane Mixing Layer by Particle Method 査読有り

    Uchiyama, T. and Naruse, M.

    Chem. Eng. Sci   61 巻   頁: 7299-7308   2006年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

  77. Vortex Simulation for Gas-Particle Two-Phase Plane Mixing Layer 査読有り

    Yagami, H. and Uchiyama, T.

    Proc. 11th Asian Cong. Fluid Mech.   on CD-ROM 巻   2006年

     詳細を見る

    記述言語:英語  

  78. Vortex Simulation of the Bubbly Flow around a Square-Section Cylinder 査読有り

    Degawa, T. and Uchiyama, T.

    Proc. 11th Asian Cong. Fluid Mech.   on CD-ROM 巻   2006年

     詳細を見る

    記述言語:英語  

  79. Vortex in Cell法による気液二相自由乱流の数値解析 査読有り

    内山知実,出川智啓

    日本機械学会論文集B編   72 巻 ( 718 ) 頁: 1418-1425   2006年

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)  

    水流中に微小な気泡が分散し,水流と気泡が相互作用を及ぼし合いながら流れる気泡流に対する渦法を開発した.角柱周りの気泡流の解析に適用し,得られた結果が実験結果と一致することを確認し,解法の妥当性も示した.

  80. Vortex Simulation of Gas-Particle Two-Phase Compound Round Jet 査読有り

    Uchiyama, T. and Fukase, A.

    Powder Technology   165 巻   頁: 83-91   2006年

     詳細を見る

    記述言語:英語   掲載種別:研究論文(学術雑誌)  

  81. Numerical Simulation of the Interaction between a Vortex Ring and Solid Particles 査読有り

    Yagami, H. and Uchiyama, T.

    Proc. 17th Int. Sympo. Transport Phenomena   on CD-ROM 巻   2006年

     詳細を見る

    記述言語:英語  

  82. Vortex Simulation of the Bubble Plume around a Rectangular Cylinder 査読有り

    Degawa, T., Uchiyama, T. and Takamatsu, Y.

    Proc. 17th Int. Sympo. Transport Phenomena   on CD-ROM 巻   2006年

     詳細を見る

    記述言語:英語  

  83. Vortex Method for Free-Surface Flow Generated by Submerged Circular Cylinder 査読有り

    Uchiyama, T. and Degawa, T.

    Proc. 23rd IAHR Sympo   on CD-ROM 巻   2006年

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    記述言語:英語  

  84. Numerical Simulation for Gas-Liquid Two-Phase Free Turbulent Flow Based on Vortex in Cell Method 査読有り

    Uchiyama, T. and Degawa, T.

    JSME Int. J., Ser. B   49 巻 ( 4 ) 頁: 1008-1015   2006年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

  85. Numerical Simulation of Particle-Laden Plane Mixing Layer by Three-Dimensional Vortex Method 査読有り

    Yagami, H. and Uchiyama, T.

    JSME Int. J. Ser.B   49 巻 ( 4 ) 頁: 1027-1035   2006年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

  86. *Three-dimensional vortex method for gas-particle two-phase compound round jet 査読有り

    Uchiyama, T., Fukase, A.

    Trans. ASME, J. Fluids Engineering   127 巻   頁: 32-40   2005年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  87. Numerical simulation of particle-laden mixing layer by vortex method 査読有り

    Yagami, H., Uchiyama, T.

    Proc. Int. Conf. Jets, Wakes and Separated Flows     頁: 313-318   2005年

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    担当区分:筆頭著者   記述言語:英語  

  88. Numerical simulation of the bubbly flow around a rectangular cylinder by vortex in cell method 査読有り

    Degawa, T., Uchiyama, T.

    Proc. Int. Conf. Jets, Wakes and Separated Flows     頁: 235-240   2005年

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    担当区分:筆頭著者   記述言語:英語  

  89. Numerical simulation of plume diffusion field around a circular cylinder by particle method 査読有り

    Uchiyama, T., Yagami, H., Sugiyama, M.

    Proc. 3rd Int. Conf. Vortex Flows and Vortex Methods     頁: 356-361   2005年

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    担当区分:筆頭著者   記述言語:英語  

  90. Numerical simulation of bubble-driven plume by vortex method 査読有り

    Uchiyama, T., Degawa, T.

    Proc. 3rd Int. Conf. Vortex Flows and Vortex Methods     頁: 350-355   2005年

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    担当区分:筆頭著者   記述言語:英語  

  91. Numerical prediction of particle-laden air jet by three-dimensional vortex method 査読有り

    Uchiyama, T., Fukase, A.

    Proc. 3rd Int. Conf. Vortex Flows and Vortex Methods     頁: 218-286   2005年

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    担当区分:筆頭著者   記述言語:英語  

  92. Numerical study on the performance of a micropump with a wiggling blade 査読有り

    Uchiyama, T., Kikuyama, K.

    J. Mechanical Engineering Science   219 巻   頁: 1069-1077   2005年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  93. Numerical simulation of blood flow in a cerebral aneurysm 査読有り

    Uchiyama, T., Fukuda, T., Arai, F., Negoro, M., Ikeda, S.

    Proc. 6th KSME-JSME Thermal and Fluids Engineering Conf.     頁: on CD-ROM   2005年

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    担当区分:筆頭著者   記述言語:英語  

  94. Vortex simulation for particulate jet generated by free falling particles 査読有り

    Uchiyama, T., Naruse, M.

    Proc. 6th KSME-JSME Thermal and Fluids Engineering Conf.     頁: on CD-ROM   2005年

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    担当区分:筆頭著者   記述言語:英語  

  95. 気泡流中におけるマイクロ屈曲翼の推進特性の数値シミュレーション 査読有り

    内山知実,菊山功嗣

    ターボ機械   33 巻 ( 4 ) 頁: 230-240   2005年

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    担当区分:筆頭著者   記述言語:日本語   掲載種別:研究論文(学術雑誌)  

  96. Numerical study on the propulsive performance of a submerged wiggling micromachine in straight conduit 査読有り

    Uchiyama, T., Kikuyama, K.

    J. Mechanical Engineering Science   219 巻   頁: 409-418   2005年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  97. 自由落下粒子群が形成する粒子噴流の三次元渦法解析 査読有り

    内山知実,成瀬正章

    日本機械学会論文集B編   71 巻 ( 707 ) 頁: 1738-1745   2005年

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    担当区分:筆頭著者   記述言語:日本語   掲載種別:研究論文(学術雑誌)  

  98. Numerical simulation for diffusion of matter in compound round jet by three-dimensional particle method 査読有り

    Uchiyama, T., Ichikawa, A.

    Chemical Engineering Science   60 巻   頁: 337-345   2005年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  99. Numerical analysis of gas-particle two-phase wake flow by vortex method 査読有り

    Uchiyama, T., Yagami, H.

    Powder Technology   149 巻   頁: 112-120   2005年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  100. Numerical simulation of particle-laden gas wake flow by vortex method 査読有り

    Uchiyama, T., Yagami, H.

    Proc. 4th Int. Symp. Environmental Hydraulics     頁: on CD-ROM   2004年

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    担当区分:筆頭著者   記述言語:英語  

  101. Three-dimensional vortex simulation of bubble dispersion in excited round jet 査読有り

    Uchiyama, T.

    Chemical Engineering Science   59 巻   頁: 1403-1413   2004年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  102. 二次元混合層における物質拡散の粒子法解析 査読有り

    内山知実,村上賢司,大槻直洋

    日本機械学会論文集B編   70 巻 ( 692 ) 頁: 839-846   2004年

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    担当区分:筆頭著者   記述言語:日本語   掲載種別:研究論文(学術雑誌)  

  103. Numerical simulation for gas-particle two-phase free turbulent flow based on vortex in cell method 査読有り

    Uchiyama, T., Naruse, M.

    Powder Technology   142 巻   頁: 193-208   2004年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  104. 三次元渦法による固気二相同軸円形噴流の数値解析 査読有り

    内山知実,深瀬昭仁

    日本機械学会論文集B編   70 巻 ( 696 ) 頁: 1957-1964   2004年

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    担当区分:筆頭著者   記述言語:日本語   掲載種別:研究論文(学術雑誌)  

  105. *Numerical simulation for the propulsion performance of a submerged wiggling micromachine 査読有り

    Uchiyama, T., Kikuyama, K.

    J. Micromechanics and Microengineering   14 巻   頁: 1537-1543   2004年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  106. Numerical simulation of gas-particle two-pahse jet by three-dimensional vortex method 査読有り

    Uchiyama, T., Fukase, A.

    Proc. 5th Int. Conf. Multiphase Flow     頁: on CD-ROM   2004年

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    担当区分:筆頭著者   記述言語:英語  

  107. Numerical simulation for bubble-laden free turbulent flow by vortex in cell method 査読有り

    Uchiyama, T., Degawa, T.

    Proc. 5th Int. Conf. Multiphase Flow     頁: on CD-ROM   2004年

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    担当区分:筆頭著者   記述言語:英語  

  108. Numerical analysis of particulate jet generated by free falling particles 査読有り

    Uchiyama, T.

    Powder Technology   145 巻   頁: 123-130   2004年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  109. Numerical simulation of particle-laden compound round jet by vortex method 査読有り

    Uchiyama, T., Fukase, A., Minemura, K.

    Proc. 3rd Int. Symp. Two-Phase Flow Modelling and Experimentation     頁: on CD-ROM   2004年

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    担当区分:筆頭著者   記述言語:英語  

  110. Numerical simulation for bubble-laden plane mixing layer by vortex in cell method 査読有り

    Uchiyama, T., Degawa, T.

    Proc. 3rd Int. Symp. Two-Phase Flow Modelling and Experimentation     頁: on CD-ROM   2004年

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    担当区分:筆頭著者   記述言語:英語  

  111. Numerical analysis for the effect of Reynolds number on propulsive performance of a submerged wiggling micromachine 査読有り

    Uchiyama, T., Kikuyama, K.

    Proc. 2004 Int. Symp. Micro/Nanomechatronics and Human Science     頁: 295-300   2004年

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    担当区分:筆頭著者   記述言語:英語  

  112. Vortex simulation for bubble-Laden free turbulent flow 査読有り

    Uchiyama, T., Degawa, T., Takamatsu, Y.

    Proc. Japan-US Seminar on Two-Phase Flow Dynamics     頁: 261-270   2004年

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    担当区分:筆頭著者   記述言語:英語  

  113. Numerical Prediction of Added Mass and Damping for a Cylinder Oscillating in Confined Incompressible Gas-Liquid Two-Phase Mixture 査読有り

    T. Uchiyama

    Nuclear Engineering and Design   222 巻   頁: 68-78   2003年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  114. 自由落下粒子群が形成する粒子噴流の数値解析 査読有り

    内山知実,北野佳伸

    日本機械学会論文集B編   69 巻 ( 684 ) 頁: 1737-1745   2003年

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    担当区分:筆頭著者   記述言語:日本語   掲載種別:研究論文(学術雑誌)  

  115. Observation and numerical simulation for wet chamical etching process of semiconductor 査読有り

    Kaneko, K., Noda, T., Sakata, M., Uchiyama, T.

    Proc. 4th ASME/JSME Joint Fluids Engineering Conf.     頁: on CD-ROM   2003年

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    担当区分:筆頭著者   記述言語:英語  

  116. Vortex in Cell法による固気二相自由乱流の数値解析 査読有り

    内山知実,成瀬正章

    日本機械学会論文集B編   69 巻 ( 686 ) 頁: 2200-2207   2003年

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    担当区分:筆頭著者   記述言語:日本語   掲載種別:研究論文(学術雑誌)  

  117. Numerical prediction of the round jet in a co-flowing stream by three-dimensional vortex method 査読有り

    Uchiyama, T.

    Int. J. Turbo & Jet Engines   20 巻 ( 3 ) 頁: 235-244   2003年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  118. Three-dimensional simulation for diffusion of matter in compound round jet by particle method 査読有り

    Uchiyama, T., Ichikawa, A.

    Proc. 4th ASME/JSME Joint Fluids Engineering Conf.     頁: on CD-ROM   2003年

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    担当区分:筆頭著者   記述言語:英語  

  119. Numerical simulation for free turbulent reacting flow by particle method 査読有り

    Uchiyama, T., Otsuki, N.

    Proc. 4th ASME/JSME Joint Fluids Engineering Conf.     頁: on CD-ROM   2003年

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    担当区分:筆頭著者   記述言語:英語  

  120. Numerical simulation of particulate jet generated by free falling particles 査読有り

    Uchiyama, T.

    Proc. 4th ASME/JSME Joint Fluids Engineering Conf.     頁: on CD-ROM   2003年

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    担当区分:筆頭著者   記述言語:英語  

  121. Numerical simulation of a compound jet by three-dimensional vortex method 査読有り

    Uchiyama, T.

    Proc. 4th ASME/JSME Joint Fluids Engineering Conf.     頁: on CD-ROM   2003年

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    担当区分:筆頭著者   記述言語:英語  

  122. Three-dimensional vortex simulation for gas-particle two-phase compound round jet 査読有り

    Uchiyama, T., Fukase, A., Minemura, K.

    Proc. 2nd Asian Particle Technology Symp.     頁: 359-364   2003年

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    担当区分:筆頭著者   記述言語:英語  

  123. Numerical simulation of wake gas flow laden with solid particles 査読有り

    Uchiyama, T., Yagami, H.,

    Proc. 2nd Asian Particle Technology Symp.     頁: 353-358   2003年

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    担当区分:筆頭著者   記述言語:英語  

  124. A numerical method for gas-solid two-phase free turbulent flow using a vortex method 査読有り

    Uchiyama, T., Naruse, M.

    Powder Technology   119 巻   頁: 206-214   2001年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  125. Numerical Prediction of Plume Diffusion Field around a Circular Cylinder by Particle Method 査読有り

    T. Uchiyama and T. Okita

    Advences in Environmental Research   7 巻   頁: 573-581   2003年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  126. Vortex Simulation of Slit Nozzle Gas-Particle Two-Phase Jet 査読有り

    T. Uchiyama nad M. Naruse

    Powder Technology   131 巻   頁: 156-165   2003年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  127. Stochastic Features of Fluctuating Pressure Waveforms through a Wedge in Air-Water Flow 査読有り

    N. Masutani, T. Uchiyama, K. Minemura and H. Tokai

    Proc. 5th JSME-KSME Fluids Eng. Conf.     2002年

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    担当区分:筆頭著者   記述言語:英語  

  128. Numerical Simulation of the Bubbly Flow around a Hydrofoil in Pitching and Heaving Motions 査読有り

    T. Uchiyama and M. Ido

    Proc. 5th JSME-KSME Fluids Eng. Conf.     2002年

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    担当区分:筆頭著者   記述言語:英語  

  129. Vortex in Cell Method for Gas-Particle Two-Phase Free Turbulent Flow 査読有り

    M. Naruse and T. Uchiyama

    Proc. 5th JSME-KSME Fluids Eng. Conf.     2002年

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    担当区分:筆頭著者   記述言語:英語  

  130. Particle Simulation for Diffusion of Matter in Plane Mixing Layer 査読有り

    N. Otsuki, K. Murakami and T. Uchiyama

    Proc. 5th JSME-KSME Fluids Eng. Conf.     2002年

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    担当区分:筆頭著者   記述言語:英語  

  131. Vortex Simulation of Bubble Dispersion in an Excited Round Jet 査読有り

    T. Uchiyama and T. Honda

    Proc. German-Japanese Workshop on Multiphase Flow     2002年

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    担当区分:筆頭著者   記述言語:英語  

  132. Numerical Study on the Propulsive Performance of a Wiggling Blade in Bubbly Flow 査読有り

    T. Uchiyama

    J. Mechanical Engineering Science   216 巻   頁: 1187-1196   2002年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  133. Numerical Simulation of Gas-Particle Two-Phase Mixing Layer by Vortex Method 査読有り

    T. Uchiyama and M. Naruse

    Powder Technology   125 巻   頁: 111-121   2002年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  134. Finite Element Analysis of Bubbly Flow Around an Oscillating Square-Section Cylinder 査読有り

    T. Uchiyama

    Finite Elements in Analysis and Design   38 巻   頁: 803-821   2002年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  135. Numerical Prediction of Bubbly Flow Around an Oscillating Hydrofoil by Incompressible Two-Fluid Model. 査読有り

    T. Uchiyama

    Int. J. Rotating Machinery   8 巻 ( 4 ) 頁: 295-304   2002年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  136. Finite Element Method of Gas-Liquid Two-Phase Flow Across an In-Line Tube Bundle 査読有り

    T. Uchiyama

    Hybrid Methods in Engineering   2 巻 ( 4 ) 頁: 355-372   2002年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  137. Numerical Simulation of Plume Diffusion Field around a Circular Cylinder by Vortex Method. 査読有り

    T. Uchiyama and T. Okita

    3rd Int. Symposium on Environmental Hydraulics     2001年

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    担当区分:筆頭著者   記述言語:英語  

  138. Vortex Simulation of Gas-Particle Two-Phase Mixing Layer 査読有り

    Tomomi Uchiyama, Masaaki Naruse, Kosuke Hirata

    Proc. 4th International Conference on Multiphase Flow     2001年

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    担当区分:筆頭著者   記述言語:英語  

  139. 渦法によるスリットノズル固気二相噴流の数値シミュレーション 査読有り

    成瀬正章,内山知実

    混相流   15 巻 ( 3 ) 頁: 280-287   2001年

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)  

  140. A Numerical Method for Gas-Solid Two-Phase Free Turbulent Flow Using a Vortex Method 査読有り

    T. Uchiyama and M. Naruse

    Powder Technology   119 巻   頁: 206-214   2001年

     詳細を見る

    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  141. 固気二相自由乱流の渦法解析 査読有り

    内山知実

    混相流   15 巻 ( 2 ) 頁: 140-150   2001年

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    担当区分:筆頭著者   記述言語:日本語  

  142. ALE Finite Element Method for Gas-Liquid Two-Phase Flow Including Moving Boundary b\Based on an Incompressible Two-Fluid Model 査読有り

    Tomomi Uchiyama

    Nuclear Engineering and Design   205 巻   頁: 69-82   2001年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  143. Numerical Study on Solid Liquid Two-Phase Flow around a Circular Cylinder Using a Vortex Method 査読有り

    omomi Uchiyama, Hikaru Arai, Masaaki Naruse

    Proc. Asia Particle Technology     2000年

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    担当区分:筆頭著者   記述言語:英語  

  144. Numerical Simulation of Gas-Particle Two-Phase Jet by Vortex Method 査読有り

    Tomomi Uchiyama, Masaaki Naruse

    Proc. Asian Particle Technology     2000年

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    担当区分:筆頭著者   記述言語:英語  

  145. 渦法による固気二相自由乱流の数値解法(数値モデルと二次元混合層への適用) 査読有り

    内山知実,成瀬正章,峯村吉泰

    日本機械学会論文集B編   66 巻 ( 651 ) 頁: 2853-2860   2000年

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    担当区分:筆頭著者   記述言語:日本語   掲載種別:研究論文(学術雑誌)  

  146. Numerical Simulation of Bubbly Flow Arounda Cross-Flow Forced Oscillating Cylinder 査読有り

    Uchiyama, T., Minemura, K.

    Proc. 2nd Japanese-European Two-Phase Flow Group Meeting     2000年

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    担当区分:筆頭著者   記述言語:英語  

  147. Numerical Analysis of Air-Water Two-Phase Flow Across a Staggered Tube Bundle Using an Incompressible Two-Fluid Model 査読有り

    Uchiyama, T.

    Nuclear Science and Engineering   134 巻 ( 3 ) 頁: 281-292   2000年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  148. 三次元一般座標系に対するCIP法粘性流解法 査読有り

    高下和浩,峯村吉泰,内山知実

    日本機械学会論文集B編   66 巻 ( 643 ) 頁: 755-760   2000年

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)  

  149. ALE有限要素法による移動境界を含む気液二相流の数値解析(非圧縮性二流体モデルを用いた解法) 査読有り

    内山知実,峯村吉泰

    日本機械学会論文集B編   66 巻 ( 647 ) 頁: 1627-1635   2000年

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    担当区分:筆頭著者   記述言語:日本語   掲載種別:研究論文(学術雑誌)  

  150. 千鳥配列円管群における直交気液二相流の数値解析 査読有り

    内山知実,峯村吉泰

    日本機械学会論文集B編   65 巻 ( 636 ) 頁: 2611-2618   1999年

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    担当区分:筆頭著者   記述言語:日本語   掲載種別:研究論文(学術雑誌)  

  151. Petrov-Galerkin Finite Element Method for Gas-Liquid Two-Phase Flow Based on an Incompressible Two-Fluid Model 査読有り

    Tomomi Uchiyama

    Nuclear Engineering and Design   193 巻   頁: 145-157   1999年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  152. Numerical Simulation of Bubbly Flow Around an Oscillating Hydrofoil 査読有り

    Tomomi Uchiyama, Kiyoshi Minemura

    Proc. Asian Symposium on Multiphase Flow     頁: 27-32   1999年

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    担当区分:筆頭著者   記述言語:英語  

  153. Numerical Simulation of Gas-Liquid Two-Phase Flow Around a Rectangular Cylinder by the Incompressible Two-Fluid Model 査読有り

    Tomomi Uchiyama

    Nuclear Science and Engineering   133 巻 ( 1 ) 頁: 92-105   1999年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  154. Fault Diagnostic Method for Pump Running Conditions Based on Process Modeling and Neural Network(共著) 査読有り

    Tomomi Uchiyama, Stephan Kallweit, Helmut Siekmann

    Int. J. Rotating Machinery   4 巻 ( 1 ) 頁: 49-59   1998年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  155. 上流型有限要素法による非圧縮性二流体モデルの数値解析(共著) 査読有り

    内山知実,峯村吉泰

    日本機械学会論文集B編   64 巻 ( 618 ) 頁: 420-427   1998年

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    担当区分:筆頭著者   記述言語:日本語   掲載種別:研究論文(学術雑誌)  

  156. Prediction of Air-Water Two-Phase Flow Performance of a Centrifugal Pump Based on One-Dimensional Two-Fluid Model 査読有り

    Minemura, K., Uchiyama, T., Shoda, S., Egashira, K.

    Trans. ASME, J. Fluids Engineering   120 巻 ( 2 ) 頁: 327-334   1998年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  157. Numerical Simulation of Cavitating Flow Using the Upstream Finite Element Method 査読有り

    Uchiyama, T.

    Applied Mathematical Modelling   22 巻   頁: 235-250   1998年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  158. Accuracy of Large Eddy Simulation for Turbulent Flow by the Finite Element Method 査読有り

    Uchiyama, T.

    J. Mechanical Engineering Science   212 巻   頁: 643-650   1998年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  159. Discretization Schemes of Advection Term in the Finite Element Method for Incompressible Navier-Stokes Equation 査読有り

    Uchiyama, T.

    J. Applied Mechanics and Engineering   3 巻 ( 1 ) 頁: 39-53   1998年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  160. Stochastic Features of Pressures Detected by a Vortex Generator- Applicability to Measurement of Indivisual Phase Flow Rates of Gas-Liquid Flow - 査読有り

    Minemura, K., Takabe, S., Uchiyama, T., Shoda, S., Yamashita, M., Ogawa, Y., Tanimoto, J.

    Proc. 3rd Int. Conf. Multiphase Flow     頁: 577   1998年

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    担当区分:筆頭著者   記述言語:英語  

  161. Upstream Finite Element Method for an Incompressible Two-Fluid Model 査読有り

    Uchiyama, T., Minemura, K.

    Proc. 3rd Int. Conf. Multiphase Flow     頁: 138   1998年

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    担当区分:筆頭著者   記述言語:英語  

  162. Finite Element Method for Gan-Liquid Two-phase Flow Based on an Incompressible Two-Fluid Model 査読有り

    Uchiyama, T., Minemura, K.

    Computer Modeling and Simulation in Engineering   2 巻 ( 1 ) 頁: 23-37   1997年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  163. Fractional Step法に基づく有限要素法による非圧縮性二流体モデルの数値解析 査読有り

    内山知実

    混相流   11 巻 ( 2 ) 頁: 141-150   1997年

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    担当区分:筆頭著者   記述言語:日本語   掲載種別:研究論文(学術雑誌)  

  164. Large Eddy Simulation by the Finite Element Method Using Multi-Pass Algorithm 査読有り

    Tomomi Uchiyama

    Proc. Int. Conf. on Fluid Engineering   3 巻   頁: 1284-1288   1997年

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    担当区分:筆頭著者   記述言語:英語  

  165. Stability Analysis of the Finite Element Method for Two-Fluid Model 査読有り

    Uchiyama, T.

    Proc. ISAC'97 High Performance Computing on Multiphase Flows     頁: 139-144   1997年

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    担当区分:筆頭著者   記述言語:英語  

  166. 有限要素法による乱流のLarge Eddy Simulation 査読有り

    内山知実

    流体熱工学研究   32 巻 ( 1 ) 頁: 15-25   1997年

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    担当区分:筆頭著者   記述言語:日本語   掲載種別:研究論文(学術雑誌)  

  167. 一次元粘性二流体モデルによるターボ形ポンプの気液二相流性能の予測法 査読有り

    峯村吉泰,内山知実,木下克彦,劉林,正田伸次,江頭和幸

    日本機械学会論文集B編   63 巻 ( 611 ) 頁: 2377-2385   1997年

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    担当区分:筆頭著者   記述言語:日本語   掲載種別:研究論文(学術雑誌)  

  168. Finite Element Method for Gas-Liquid Two-Phase Flow Using a Fractional Step Method 査読有り

    Uchiyama, T., Minemura, K.

    Proc. 2nd Japanese-German Symp. on Multi-Phase Flow,     頁: 289-300   1997年

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    担当区分:筆頭著者   記述言語:英語  

  169. Numerical Analysis of an Incompressible Two-Fluid Model by Finite Element Method based on a Fractional Step Method 査読有り

    Uchiyama, T.

    Computer Modeling and Simulation in Engineering   2 巻 ( 4 ) 頁: 363-385   1997年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  170. Discretization Schemes of the Finite Element Method for Advection Terms of an Incompressible Two-Fluid Model 査読有り

    Uchiyama, T.

    Computer Modeling and Simulation in Engineering   2 巻 ( 2 ) 頁: 145-161   1997年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  171. Numerical Prediction of Cavitating Flow by the Finite Element Method 査読有り

    Uchiyama, T.

    Proc. Int. Conf. on Fluid Engineering   1 巻   頁: 449-454   1997年

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    担当区分:筆頭著者   記述言語:英語  

  172. Prediction of Gas-Liquid Two-Phase Flow Performance of a Centrifugal Pump Based on One-Dimensional Two-Fluid Model 査読有り

    Minemura, K., Uchiyama, T., Kinoshita, K., Liu, L., Shoda, S., Egashira, K.

    Proc. Int. Conf. on Fluid Engineering   1 巻 ( 1 ) 頁: 467-472   1997年

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    担当区分:筆頭著者   記述言語:英語  

  173. 有限要素法による非圧縮性二流体モデルの数値解析(数値解法と円柱まわりの流れ解析) 査読有り

    内山知実,峯村吉泰

    日本機会学会論文集B編   62 巻 ( 595 ) 頁: 977-984   1996年

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    担当区分:筆頭著者   記述言語:日本語   掲載種別:研究論文(学術雑誌)  

  174. 正方形断面をもつ回転流路内で発達する気泡流に対する三次元乱流解析 査読有り

    峯村吉泰,呉景春,内山知実

    日本機械学会論文集B編   62 巻 ( 603 ) 頁: 3784-3791   1996年

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    担当区分:筆頭著者   記述言語:日本語   掲載種別:研究論文(学術雑誌)  

  175. Numerical Simulation of Bubbly Flows in a Rotating Straight Channel 査読有り

    Uchiyama, T., Minemura, K., Wu, J., Emura, T.

    Proceeding of Int. Sympo. on Fluid Machinery and Fluid Engineering     頁: 131-138   1996年

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    担当区分:筆頭著者   記述言語:英語  

  176. Study on Discretization of Convective Terms in Finite Element Method for Incompressible Two-Fluid Model 査読有り

    Uchiyama, T.

    Proc. The Second Asian Computational Fluid Dynamics Conference     頁: 529-534   1996年

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    担当区分:筆頭著者   記述言語:英語  

  177. 固液二相流時のポンプケーシング魔耗量の数値予測 査読有り

    峯村吉泰,鐘原,内山知実

    日本機会学会論文集B編   61 巻 ( 587 ) 頁: 2571-2578   1995年

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    担当区分:筆頭著者   記述言語:日本語   掲載種別:研究論文(学術雑誌)  

  178. Knowledge-Based Fault Diagnosis for Pump Stations by Process Modeling 査読有り

    Uchiyama, T. Kallweit, S., Siekmann, H.

    Proceedings of Fluid Machinery Forum     頁: 117-121   1995年

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    担当区分:筆頭著者   記述言語:英語  

  179. Finite Element Analysis of Incompressible Two-Fluid Model 査読有り

    Uchiyama, T.

    Proceeding of Cavitation and Multi-Phase Flow Forum     頁: 115-119   1995年

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    担当区分:筆頭著者   記述言語:英語  

  180. Three-Dimensional Calculation of Air-Water Two-Phase Flow in a Centrifugal Pump Based on a Bubbly Flow Model with Fixed Cavity 査読有り

    Minemura, K., Uchiyama, T.

    JSME International, Series B   37 巻 ( 4 ) 頁: 726-735   1994年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  181. 回転場におかれた直管内気泡流に対する数値解析(レイノルズ応力に混合距離理論を用いた解析) 査読有り

    内山知実,峯村吉泰,江村武

    日本機械学会論文集B編   60 巻 ( 577 ) 頁: 2967-2975   1994年

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    担当区分:筆頭著者   記述言語:日本語   掲載種別:研究論文(学術雑誌)  

  182. Flow Visualization in a Cavitating Flow 査読有り

    Dues, M., Gebhardt, A., Kallweit, S., Scheffler, T., Siekmann, H., Uchiyama, T.

    Proceedings of the German-Japanese Symposium on Multi-Phase Flow     頁: 391-402   1994年

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    担当区分:筆頭著者   記述言語:英語  

  183. 空洞を伴う気泡流モデルによる二相流ポンプの解析(羽根出口角度と回転数の影響) 査読有り

    峯村吉泰,内山知実

    日本機械学会論文集,B編   60 巻 ( 571 ) 頁: 920-925   1994年

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    担当区分:筆頭著者   記述言語:日本語   掲載種別:研究論文(学術雑誌)  

  184. Numerical Prediction of Two-Phase-Flow Pump Performance by a Bubbly Flow Model with Fixed Cavity 査読有り

    K. Minemura and T. Uchiyama

    Proc. German-Japanese Symposium on Multi-Phase Flow     頁: 403-417   1994年

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    担当区分:筆頭著者   記述言語:英語  

  185. Experimental Investigations on Bubbly Flows in a Straight Channel Rotated Around Axis Perpendicular to the Channel 査読有り

    Minemura, K., Uchiyama, T., Ishikawa, T.

    International Journal of Multiphase Flow   19 巻 ( 3 ) 頁: 439-450   1993年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  186. Three-Dimensional Calculation of Air-Water Two-Phase Flow in Centrifugal Pump Impeller Based on a Bubbly Flow Model 査読有り

    Minemura, K., Uchiyama, T.

    Transaction of ASME, Journal of Fluids Engineering   115 巻 ( 4 ) 頁: 766-771   1993年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  187. Prediction of Pump Performance Under Air-Water Two-Phase Flow Based on a Bubbly Flow Model 査読有り

    Minemura, K., Uchiyama, T.

    Transaction of ASME, Journal of Fluids Engineering   115 巻 ( 4 ) 頁: 781-783   1993年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  188. 離散点で傾きが与えられたときの双一次パッチによる曲面形状決定法(共著) 査読有り

    内山知実,峯村吉泰

    図学研究   ( 61 ) 頁: 3-8   1993年

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    担当区分:筆頭著者   記述言語:日本語   掲載種別:研究論文(学術雑誌)  

  189. 空洞を伴う気泡流モデルによる渦巻ポンプ羽根車内の気液二相流に対する三次元数値解析 査読有り

    峯村吉泰,内山知実

    日本機械学会論文集B編   58 巻 ( 550 ) 頁: 1803-1810   1992年

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    担当区分:筆頭著者   記述言語:日本語   掲載種別:研究論文(学術雑誌)  

  190. 離散点で与えられた1階偏導関数値に対する数値積分法 査読有り

    内山知実,峯村吉泰

    日本機械学会論文集B編   58 巻 ( 550 ) 頁: 1747-1752   1992年

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    担当区分:筆頭著者   記述言語:日本語   掲載種別:研究論文(学術雑誌)  

  191. 半径流形回転流路内における気泡流の流動特性 査読有り

    峯村吉泰,内山知実,石川武彦

    日本機械学会論文集B編   57 巻 ( 542 ) 頁: 3317-3324   1991年

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    担当区分:筆頭著者   記述言語:日本語   掲載種別:研究論文(学術雑誌)  

  192. Simplex Finite Element Analysis for Cascade Flows Satisfying the Kutta Condition(共著) 査読有り

    Minemura, K., Uchiyama, T.

    Proceeding of Fluid Machinery Forum     頁: 65-69   1991年

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    担当区分:筆頭著者   記述言語:英語  

  193. Calculation of Two-phase Flow Pump Performance by a Bubbly Flow Model with Fixed Cavity 査読有り

    Minemura, K., Uchiyama, T.

    Proceeding of Cavitation and Multiphase Flow Forum     頁: 131-134   1991年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  194. Calculation of the three-dimensional behaviour of spherical solid particles entrained in a radial-flow impeller pump 査読有り

    Minemura, K., Uchiyama, T.

    Journal of Mechanical Engineering Science   204 巻   頁: 159-168   1990年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  195. 自由曲線形状境界に第2種境界条件が作用する領域に対する線形一次有限要素解析(第1報,曲線形状を考慮した節点数低減法) 査読有り

    峯村吉泰,内山知実

    日本機械学会論文集B編   56 巻 ( 531 ) 頁: 3343-3350   1990年

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    担当区分:筆頭著者   記述言語:日本語   掲載種別:研究論文(学術雑誌)  

  196. 自由曲線形状境界に第2種境界条件が作用する領域に対する線形一次有限要素解析(第2報,二次元翼列流れへの適用) 査読有り

    日本機械学会論文集B編   56 巻 ( 531 ) 頁: 3351-3359   1990年

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    担当区分:筆頭著者   記述言語:日本語   掲載種別:研究論文(学術雑誌)  

  197. 渦巻ポンプ羽根車内の気液二相流に対する気泡流モデルによる三次元数値解析(第1報,ボイド率および圧力分布) 査読有り

    峯村吉泰,内山知実

    日本機械学会論文集B編   55 巻 ( 516 ) 頁: 2364-2373   1989年

     詳細を見る

    担当区分:筆頭著者   記述言語:日本語   掲載種別:研究論文(学術雑誌)  

  198. 渦巻ポンプ羽根車内の気液二相流に対する気泡流モデルによる三次元数値解析(第2報,ポンプ性能変化) 査読有り

    峯村吉泰,内山知実

    日本機械学会論文集B編   55 巻 ( 516 ) 頁: 2374-2382   1989年

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    担当区分:筆頭著者   記述言語:日本語   掲載種別:研究論文(学術雑誌)  

  199. 完全三次元解法によるスクリュー式遠心ポンプ内の流れと混入粒子の流れ解析 査読有り

    峯村吉泰,内山知実,那波隆之,勝田長生

    日本機械学会論文集B編   55 巻 ( 520 ) 頁: 3636-3642   1989年

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    担当区分:筆頭著者   記述言語:日本語   掲載種別:研究論文(学術雑誌)  

  200. 体形状の測定値に基づく洋服型紙の対話形作成 査読有り

    峯村吉泰,王徳忠,内山知実

    日本設計工学会会誌   24 巻 ( 10 ) 頁: 370-375   1989年

     詳細を見る

    担当区分:筆頭著者   記述言語:日本語   掲載種別:研究論文(学術雑誌)  

  201. Interactive Pattern-Making for Men's or Women's Garments Based on Measurements of a Body Form 査読有り

    Minemura, K., Uchiyama, T., Wang, D.

    Proceedings of 2nd International Conference on Computer Aided Drafting Design and Manufacturing Technology     頁: 349-354   1989年

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    担当区分:筆頭著者   記述言語:英語  

  202. 軸対称物体まわりの気泡の流れに及ぼす履歴効果 査読有り

    峯村吉泰,内山知実

    日本機械学会論文集B編   54 巻 ( 502 ) 頁: 1325-1331   1988年

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    担当区分:筆頭著者   記述言語:日本語   掲載種別:研究論文(学術雑誌)  

  203. Flow of Cavitation Bubbles in a Centrifugal Pump Impeller 査読有り

    Minemura, K., Murakami, M., Uchiyama, T.

    Japan Society of Mechanical Engineers, International Journal Series. II   31 巻 ( 1 ) 頁: 30-38   1988年

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    担当区分:筆頭著者   記述言語:英語   掲載種別:研究論文(学術雑誌)  

  204. 半径流ポンプ内の固体粒子の流れ(第2報,完全三次元流れ場における運動) 査読有り

    峯村吉泰,内山知実

    日本機械学会論文集B編   53 巻 ( 490 ) 頁: 1677-1684   1987年

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    担当区分:筆頭著者   記述言語:日本語   掲載種別:研究論文(学術雑誌)  

  205. 渦巻ポンプ羽根車内のキャビテーション気泡の挙動 査読有り

    峯村吉泰,菊山功嗣,村上光清

    日本機械学会論文集B編   53 巻 ( 491 ) 頁: 1878-1886   1987年

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    担当区分:筆頭著者   記述言語:日本語   掲載種別:研究論文(学術雑誌)  

  206. Theoretical Analysis of Cavitation Bubble Behavior in a Radial - flow Impeller 査読有り

    Minemura, K., Murakami, M., Kikuyama, K., Uchiyama, T., Sawada, S.

    Proceeding of International Symposium on Cavitation     頁: 281-286   1986年

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    担当区分:筆頭著者   記述言語:英語  

  207. Falling behavior of hollow particle with uniaxial through-hole: A case study using experiments and numerical simulations

    Takamure K., Tanaka J., Kato H., Uchiyama T.

    POWDER TECHNOLOGY   392 巻   頁: 367 - 374   2021年11月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Powder Technology  

    In this study, experiments and numerical simulations are performed where a hollow particle with a uniaxial through–hole is dropped freely in water, and its behavior is investigated. The distribution of falling particle trajectories reveals significant deviation in the direction perpendicular to the through–hole of the particle. In addition, the pressure distribution at the particle surface and the vorticity field of the wake of the particle are distributed asymmetrically in the plane perpendicular to the through–hole of the particle. Conversely, this pressure distribution and vorticity field are distributed symmetrically with respect to the direction parallel to the through–hole of the particle. Thus, this study clarifies that the movement of the particle in the direction parallel to the through–hole is suppressed. These results provide valuable novel insights into the control of particle motion.

    DOI: 10.1016/j.powtec.2021.07.020

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  208. Effect of Froude number on the motion of a spherical particle launched vertically upward in water

    Takamure K., Uchiyama T.

    EXPERIMENTAL THERMAL AND FLUID SCIENCE   128 巻   2021年10月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Experimental Thermal and Fluid Science  

    A spherical particle with a diameter of 25.4 mm and density of 2640 kg/m3 was launched vertically upward toward the free surface of calm water. The Froude number of the particle passing through the water surface was varied. The dependence of the Froude number on the particle motion and water surface behavior was investigated from the instant the particle crossed the water surface until it attained its maximum displacement position. Based on the classical energy conservation law, the energy lost in the interaction between the particle and water surface (i.e., interface containing energy, Eo) was estimated. Eo was found to increase with the increase in the Froude number when the particle crossed the water surface. In addition, owing to Eo at the maximum displacement position of the spherical particle, the height and width of the interfacial water sheet changed by the same ratio at the point of intersection of the upper side of the particle with the calm water surface. This result was in agreement with that obtained by changing the submergence depth, as reported by Takamure and Uchiyama (2020). This finding suggests that the characteristics of the interfacial water sheet are the dominant parameters influencing the interface containing energy. The presented findings can help determine the parameters to model the water exit problem.

    DOI: 10.1016/j.expthermflusci.2021.110453

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  209. Behavior of a solid sphere launched vertically upwards in water and its interaction with the air-water interface

    Takamure K., Uchiyama T.

    OCEAN ENGINEERING   235 巻   2021年9月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Ocean Engineering  

    An experiment was conducted in which a solid sphere with a density of 1,875 kg/m3 and diameter of 24.8 mm was launched vertically upwards in water towards the air–water interface. By changing the Reynolds number, Re, based on the launch velocity, the motion of the sphere due to interference with the air–water interface was investigated along with the behavior of the interface. The experimental results of the sphere's vertical position in water agree with the theoretical values. However, in air, the experimental results gave lower vertical positions than the theoretical values. When the Reynolds number where the sphere reaches the air–water interface is Rew1¯=0.2×103, the vertical trajectory of the sphere branches above and below the ensemble average immediately after passing the air–water interface. This difference in bifurcation does not depend on the Reynolds number in water. However, no branching occurs when Rew1¯ is large. There is an inverse relationship between the asymmetry of the air–water interface that occurs when the sphere passes through the interface and the sphere's maximum displacement. It was shown that the energy loss of the sphere and the asymmetry of the air–water interface have a linear relationship in all cases with different Reynolds numbers. This means that there is a invariant relationship between the energy lost by the sphere passing through the air–water interface and the asymmetry of the interface.

    DOI: 10.1016/j.oceaneng.2021.109282

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  210. Falling of a Spherical Particle in Fine-Bubble Plume and Fine-Bubble Behavior around the Particle

    Takamure K., Kawasaki Y., Degawa T., Uchiyama T.

    FLUID DYNAMICS   56 巻 ( 5 ) 頁: 612 - 621   2021年9月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Fluid Dynamics  

    Abstract—: In this study, the interaction between a spherical solid particle descending in a fine-bubble plume and the fine-bubbles around the particle is investigated experimentally. The fine-bubbles, which are formed by water electrolysis and have an average diameter of 0.037 mm, rise via buoyancy to form bubble plumes. The average bubble velocity in the conduit is 0.05 mm/s. A spherical solid particle with a diameter of 11.1 mm and a density of 1130 kg/m3 is dropped into the fully-developed bubble plume. The particle falls in a meandering motion in the fine-bubble plume. In this process, the terminal velocity of the particles falling in the fine-bubble plume is almost identical to that of a particle falling in the quiescent water. Additionally, after the fine-bubbles have been separated from the particle surface, they flow into the wake of the particle, forming a stagnant region. The particle wake diameter increases threefold, as compared with its value in the downstream direction of the fine-bubble plume.

    DOI: 10.1134/S001546282105013X

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  211. Mixing of a two-layer density-stratified fluid by two vortex rings successively launched toward the density interface

    Cao Lile, Takamure Kotaro, Degawa Tomohiro, Uchiyama Tomomi

    JOURNAL OF VISUALIZATION   24 巻 ( 4 ) 頁: 683 - 697   2021年8月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Journal of Visualization  

    Abstract: In this study, two vortex rings composed of upper fluid were continuously ejected vertically downward toward the interface of the two-layer density-stratified fluid. The motion of the vortex rings and behavior of the lower layer fluid were investigated via visualization experiment, and the effect of time interval between the injections of the two vortex rings on the mixing of the density-stratified fluid was investigated. The first emitted vortex ring (VRA) advected vertically downward in the upper layer, passed through the density interface, and then advected in the lower layer. After VRA reached the maximum depth in the lower layer, the upper part of the fluid mass ejected into the upper layer due to buoyancy. The lower fluid was entrained in the upper layer. Subsequently, a new vortex ring (VRC) was generated by the fluid mass ejected in the upper layer and advected vertically upward in the upper layer. The second vortex ring emitted (VRB) collided with the tip of the fluid mass of the VRA ejected from the lower layer. Subsequently, it slightly penetrated the lower layer, rolled up the lower layer fluid into the upper layer, and coalesced with VRC to collapse. In the process of vortex merging, the mixing of the upper and lower layers reached a maximum when the VRA reached the maximum depth. Furthermore, it was clarified that the mixing ability of the upper and lower layers depends on the ejection time interval of the two vortex rings. Graphic abstract: [Figure not available: see fulltext.]

    DOI: 10.1007/s12650-020-00738-8

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  212. Vortex-in-cell simulation of the flow and performance of a Savonius hydraulic turbine with S-shaped blades

    Takamure Kotaro, Wang Haotian, Uchiyama Tomomi, Iio Shouichiro, Ikeda Toshihiko

    JOURNAL OF RENEWABLE AND SUSTAINABLE ENERGY   13 巻 ( 4 )   2021年7月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Journal of Renewable and Sustainable Energy  

    The volume penalization vortex-in-cell (VP-VIC) method, which combines the vortex-in-cell and vortex penalization methods, is a kind of immersed boundary method that has the advantage of accurately calculating the vorticity field near the boundary. It is expected to be used as a design tool for shape optimization. In this study, the flow and performance of a small Savonius turbine rotor (rotor diameter DR = 245 mm) with S-shaped blades, which is used for small-scale distributed power generation with output less than 100 kW, were analyzed by numerical simulation. The results were compared with those of previous experimental studies to examine the usefulness of the VP-VIC method for fluid analysis around the Savonius turbine. The Reynolds number (Re=U0DR/ν) based on the streamwise velocity U0 is 1.32×105. The volume penalization vortex-in-cell (VP-VIC) method is applied for flow simulation, and the rotational motion of the rotor is analyzed using the calculation method previously proposed by the authors for the fluid force acting on the solid boundary (blade surface). As a result, the relationship between the rotational speed of the rotor and the output coefficient obtained in this simulation is similar in the experimental results of Golecha et al. [Appl. Energy 88, 3027-3217 (2011)] using S-shaped blades. In particular, with an increase in the load torque, the rotational speed of the rotor decreases, and the rotor stops momentarily. When the rotor stops, the positive torque of clockwise rotation acts on the advancing blade, while the negative torque of counterclockwise rotation acting on the returning blade decreases; hence, the rotor restarts immediately after stopping. In addition, it is established that the rotor output can be accurately predicted. Based on the above, it is reconfirmed that the VP-VIC method is beneficial for predicting the performance of a Savonius turbine.

    DOI: 10.1063/5.0051203

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  213. Development of a self-powered wireless sensor node to measure the water flowrate by using a turbine flowmeter

    Uchiyama Tomomi, Takamure Kotaro, Okuno Yuta, Sato Eiichi

    INTERNET OF THINGS   13 巻   2021年3月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Internet of Things (Netherlands)  

    A self-powered wireless sensor node was developed to measure the water flowrate. It is composed of a turbine flowmeter and an IoT control unit. The turbine flowmeter generates electric power from the rotation of the rotor. The IoT control unit, consisting of a microcomputer and a low power wide area (LPWA) communication module, uses the power generated by the rotor rotation to detect the rotational speed of the rotor (the water flowrate) and to communicate wirelessly with a server on the Internet. Experiments were also conducted to evaluate the performance of the sensor node. The power generated by the rotor rotation was sufficient to operate the wireless sensor node as a self-powered unit. The full-scale accuracy and indication accuracy of the measured flowrate were 1.2% and 2.8%, respectively. The wireless sensor node could stably upload the measured flowrate to a server on the Internet.

    DOI: 10.1016/j.iot.2020.100327

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  214. Motion of a Solid Sphere Launched Vertically Upward in Water and Deformation of Water Surface by the Sphere

    Takamure K., Uchiyama T.

    Lecture Notes in Mechanical Engineering     頁: 159 - 166   2021年

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Lecture Notes in Mechanical Engineering  

    A solid sphere is launched vertically upward from water toward the air–water interface, and the modulation of the sphere’s motion and the behavior of the air–water interface induced by the sphere are investigated. Spheres with three different densities ρp are used: the almina sphere (ρp = 3900 kg/m3), teflon sphere (ρp = 2180 kg/m3), and duracon sphere (ρp = 1360 kg/m3). Through a visualization experiment on the motion of a sphere in water, it was demonstrated that the launch velocity of the sphere can be set with high accuracy. When the sphere passes through the air–water interface, it forms a complex interface while entraining water. Additionally, spheres with small ρp were demonstrated to not always vertically collide with the air–water interface; this causes different behaviors of the spheres in the air.

    DOI: 10.1007/978-981-15-5183-3_17

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  215. Effect of density of a sphere launched vertically in water on the water-surface behavior and sphere motion in air

    Takamure K., Uchiyama T.

    PHYSICS OF FLUIDS   32 巻 ( 11 )   2020年11月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Physics of Fluids  

    Submerged solid spheres with specific gravities relative to water ranging from 1.36 to 7.93 were launched vertically upward toward the free surface of calm water. The motion of each sphere and the behavior of the water surface were investigated from the time the sphere passed through the calm water surface until it attained its maximum displacement position. The energy lost in the interaction between the sphere and the water surface (i.e., the interfacial containing energy Eo) was estimated from energy conservation. A larger Eo at the maximum displacement position of the sphere led to a larger increase in the height and width of the interfacial water sheet where the upper side of the sphere intersected with the free surface of calm water. This result corresponded to the result obtained by changing the submergence depth, as reported by Takamure and Uchiyama ["Air-water interface dynamics and energy transition in air of a sphere passed vertically upward through the interface,"Exp. Therm. Fluid Sci. 118, 110167 (2020)]. This aspect suggests that the characteristics of the interfacial water sheet are the dominant parameters influencing Eo. The presented findings can facilitate the determination of parameters to model the water exit problem.

    DOI: 10.1063/5.0024032

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  216. Dynamics of a sphere launched vertically in water

    Takamure K., Uchiyama T.

    POWDER TECHNOLOGY   372 巻   頁: 246 - 257   2020年7月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)  

    DOI: 10.1016/j.powtec.2020.05.091

    Web of Science

  217. Effect of cylinders on the characteristics of a fine-bubble plume

    Takamure K., Degawa T., Kano R., Uchiyama T.

    Journal of Fluid Science and Technology   15 巻 ( 3 ) 頁: JFST0019 - JFST0019   2020年

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Journal of Fluid Science and Technology  

    The characteristics of a fine-bubble plume passing through two tandem cylinders are investigated. Fine-bubbles with a mean diameter of 0.055 mm are released by water electrolysis from electrodes placed at the bottom of a tank. They induce an upward water flow around them with rising due to buoyancy. Orthogonally to the axis of such fine-bubble plume, two cylinders with a diameter D of 30 mm are arranged in tandem. The distance between the cylinders, L, ranges between 1.5D and 3D. This study visualizes the bubbles and water flow around the cylinders. It also measures the bubble velocity distribution. The experiments reveal the water and bubble shear layers originating at the sides of the lower cylinder and make clear their behavior around the upper cylinder. This study elucidates the effects of L on the characteristics of the fine-bubble plume, such as the stagnant bubbly flow and the bubbly wake around the cylinders.

    DOI: 10.1299/JFST.2020JFST0019

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  218. 遮へい板が設置されたサボニウス水車の流れと性能の数値シミュレーション

    高牟礼 光太郎, 谷 強, 出川 智啓, 内山 知実, 飯尾 昭一郎, 池田 敏彦

    日本機械学会論文集   86 巻 ( 887 ) 頁: 20 - 00181-20-00181   2020年

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    掲載種別:研究論文(学術雑誌)   出版者・発行元:一般社団法人 日本機械学会  

    <p>The flow and performance of a rotor of a Savonius hydraulic turbine provided with a shield plate were analyzed by the two-dimensional simulations. The rotor diameter <i>D<sub>R</sub></i> is 142 mm, and the Reynolds number based on the velocity of the main flow <i>U</i><sub>0</sub>, <i>U</i><sub>0</sub><i>D<sub>R</sub></i>/<i>ν</i>, is 1.1×10<sup>5</sup>. The shield plate with a length of 0.5<i>D<sub>R</sub></i> is installed upstream of the rotor, perpendicular to the main flow. The comparative experimental studies have visualized the flow and clarified that the shield plate increases the power output of the rotor. The vortex in cell method combined with the volume penalization method was applied to the flow simulation, and the torque acting on the rotor was computed with a custom method by the authors. The simulated flows around the shield plate and rotor agreed with the experimentally visualized ones. The simulation successfully revealed the effect of the shield plate on the flow and power output of the rotor. These demonstrate the applicability of the present simulation method for the performance prediction of the rotor of Savonius hydraulic turbines provided with a shield plate.</p>

    DOI: 10.1299/transjsme.20-00181

  219. 水中から鉛直上方に射出された球体の空気中の運動と気液界面挙動に及ぼす球体密度の影響

    高牟礼 光太郎, 内山 知実

    流体工学部門講演会講演論文集   2020 巻 ( 0 ) 頁: OS03 - 10   2020年

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:一般社団法人 日本機械学会  

    DOI: 10.1299/jsmefed.2020.OS03-10

  220. Experimental study of mixing of two-layer density-stratified fluid by a vortex ring

    Cao L., Ito R., Degawa T., Matsuda Y., Takamure K., Uchiyama T.

    ASME-JSME-KSME 2019 8th Joint Fluids Engineering Conference, AJKFluids 2019   5 巻   2019年

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:ASME-JSME-KSME 2019 8th Joint Fluids Engineering Conference, AJKFluids 2019  

    This study experimentally investigates the mixing of a two-layer density-stratified fluid of water (upper layer) and aqueous sodium chloride (NaCl) solution (lower layer) induced by the interaction between a vortex ring and the density interface. The vortex ring, which consists of water, is launched from an orifice in the upper layer toward the density interface, after which its motion, along with the behavior of the lower fluid, is visualized through a planar laser-induced fluorescence method. The Atwood number that expresses the nondimensional density jump across the density interface is set at 0.0055, and the Reynolds number Re of the vortex ring is varied from 2050 to 3070. The visualization experiment clarifies that the vortex ring penetrating the density interface is bounced while collapsing in the lower fluid. Furthermore, it elucidates that the bounced upper fluid entrains the lower fluid into the upper layer by inducing a second vortex ring consisting of the lower fluid. Thus, this study reveals the effect of Re on the mixing of the upper and lower fluid induced by the launched vortex ring.

    DOI: 10.1115/AJKFluids2019-4972

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  221. 縦横比の異なる矩形オリフィスからのキャビテーション噴流の挙動と騒音特性

    武井 裕紀, 渡辺 あかり, 飯尾 昭一郎, 吉田 太志, 内山 知実

    流体工学部門講演会講演論文集   2019 巻 ( 0 ) 頁: OS3 - 23   2019年

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    掲載種別:研究論文(学術雑誌)   出版者・発行元:一般社団法人 日本機械学会  

    <p>Cavitation is one of the significant issues for water hydraulic components. This study focuses on the relationships between the cavitation phenomenon and noise under various pressure condition. Cavitating jet from a rectangular orifice with different aspect ratio was investigated in this study to reveal the critical parameter for the cavitation in a water hydraulic spool valve. The author performed flow visualization and noise measurement. The experimental results showed that the relationship between jet behavior and noise characteristics. The noises of all aspect ratio jets had a peak at the same positive downstream pressure. The both of cavitation and noise were suppressed for the largest aspect ratio of <i>AR</i>=52.0.</p>

    DOI: 10.1299/jsmefed.2019.OS3-23

  222. 水中から水面に向けて打ち上げられた固体球の運動と気液界面の挙動

    高牟礼 光太郎, 内山 知実

    流体工学部門講演会講演論文集   2019 巻 ( 0 ) 頁: OS3 - 8   2019年

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    掲載種別:研究論文(学術雑誌)   出版者・発行元:一般社団法人 日本機械学会  

    <p>To investigate the variation in a sphere's motion and the behavior of the air-water interface induced by the sphere, a solid sphere is launched vertically upward in water toward the air-water interface. Four spheres with different densities <i>ρ<sub>p</sub></i> were studied: a stainless steel sphere (<i>ρ<sub>p</sub></i> = 7930 kg/m<sup>3</sup>), an alumina sphere (<i>ρ<sub>p</sub></i> = 3900 kg/m<sup>3</sup>), a Teflon sphere (<i>ρ<sub>p</sub></i> = 2180 kg/m<sup>3</sup>), and a Duracon sphere (<i>ρ<sub>p</sub></i> = 1360 kg/m<sup>3</sup>). By experimentally visualizing the sphere motion in water, their launch velocity can be set with high accuracy. When a sphere passes through the air--water interface, it makes the interface more complex and entrains water. Additionally, spheres with a small value of <i>ρ<sub>p</sub></i> were demonstrated to not always vertically collide with the air--water interface.</p>

    DOI: 10.1299/jsmefed.2019.OS3-08

  223. 気泡プルームの内部における物体まわりの流れ

    内山 知実

    年次大会   2019 巻 ( 0 )   2019年

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    掲載種別:研究論文(学術雑誌)   出版者・発行元:一般社団法人 日本機械学会  

    <p>This article describes the flow around bluff body in microbubble plume. Firstly, the flow around two circular cylinders arranged in tandem within a microbubble plume was investigated. The experiment revealed the water and bubble shear layers originating at the sides of the lower cylinder, and allowed the elucidation of their behavior around the upper cylinder. Secondly, the motion of a solid spherical particle in a microbubble plume and the behavior of bubbles around the particle were studied. The studies clarified the bubble distribution and velocity around the particle.</p>

    DOI: 10.1299/jsmemecj.2019.W05102

  224. マイクロバブルプルームの内部に直列配置された2つの円柱周りの流れ

    内山 知実, 鹿野 良太, 出川 智啓, 高牟礼 光太郎

    流体工学部門講演会講演論文集   2019 巻 ( 0 ) 頁: OS3 - 7   2019年

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    掲載種別:研究論文(学術雑誌)   出版者・発行元:一般社団法人 日本機械学会  

    <p>This study investigates the flow past two cylinders arranged in tandem within a microbubble plume inside a tank. Microbubbles with a mean diameter of 0.055 mm are released by water electrolysis from electrodes placed at the bottom of the tank. Upon rising, these microbubbles induce an upward water flow around them due to buoyancy. Orthogonally to the axis of this microbubble plume, two cylinders with a diameter <i>D</i> of 30 mm are arranged in tandem. The distance between the cylinders, <i>L</i>, ranges between 1.5<i>D</i> and 3<i>D</i>. The bubbles and the water flow around the cylinders are visualized, and the bubble velocity distribution is measured. The experiments reveal the water and bubble shear layers originating at the sides of the lower cylinder, and allow the elucidation of their behavior around the upper cylinder. Furthermore, this study makes clear the effects of <i>L</i> on the flow around the two cylinders, such as the stagnant bubbly flow and the bubbly wake.</p>

    DOI: 10.1299/jsmefed.2019.OS3-07

  225. Vortex in Cell法とVolume Penalization法によるサボニウス水車のロータの流れと性能の数値シミュレーション

    高牟礼 光太郎, 内山 知実, 谷 強, 出川 智啓, 飯尾 昭一郎, 池田 敏彦

    年次大会   2019 巻 ( 0 )   2019年

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    掲載種別:研究論文(学術雑誌)   出版者・発行元:一般社団法人 日本機械学会  

    <p>This study is concerned with the numerical simulations of the flow and performance of a rotor of a hydraulic Savonius turbine. The flow was simulated using the vortex in cell (VIC) method in combination with the volume penalization (VP) method. The torque acting on the rotor was computed using a custom method, which can accurately calculate the fluid forces on solid bodies in flows simulated by the VIC-VP method, to analyze the rotational speed and power output of the rotor. The simulated flow around the rotating blades agreed qualitatively with the experimentally visualized flow, and the analyzed relation between the rotor's rotational speed and power output agreed well with the experimentally measured relation. These demonstrate that the VIC-VP method in combined with the authors' method for calculating fluid forces is applicable for the simulations of flow and performance of hydraulic Savonius turbines.</p>

    DOI: 10.1299/jsmemecj.2019.S05121

  226. MPS法によるナノ厚さ液体膜を介したピンオンディスク摺動の数値シミュレーション

    渡部 祥太朗, 内山 知実, 高牟礼 光太郎, 張 賀東, 出川 智啓

    年次大会   2019 巻 ( 0 )   2019年

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    掲載種別:研究論文(学術雑誌)   出版者・発行元:一般社団法人 日本機械学会  

    <p>Pin-on-disk sliding tests have been carried out to investigate lubrication properties of nanometer-thick liquid films. However, it is difficult to experimentally observe the detailed flow behavior of the films at the nanoscale contacting interface. To solve this problem, we performed numerical simulations with the moving particle semi-implicit (MPS) method in this study. To model a pin sitting on a rotating disk lubricated with a nanometer-thick liquid film, the effects of surface tension and external force were taken into account in the governing equation. As a result, details of the behavior of the film and pin and their interference were visualized. This result suggests that the MPS method is potentially useful for clarifying the mechanism of lubrication with nanometer-thick liquid films.</p>

    DOI: 10.1299/jsmemecj.2019.S16105P

  227. Flow past two cylinders arranged in tandem within a microbubble plume

    Uchiyama T., Kano R., Degawa T., Takamure K.

    ASME-JSME-KSME 2019 8th Joint Fluids Engineering Conference, AJKFluids 2019   5 巻   2019年

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:ASME-JSME-KSME 2019 8th Joint Fluids Engineering Conference, AJKFluids 2019  

    This study investigates the flow past two cylinders arranged in tandem within a microbubble plume inside a tank. Microbubbles with a mean diameter of 0.055 mm are released by water electrolysis from electrodes placed at the bottom of the tank. Upon rising, these microbubbles induce an upward water flow around them due to buoyancy. Orthogonally to the axis of this microbubble plume, two cylinders with a diameter D of 30 mm are arranged in tandem. The distance between the cylinders, L, ranges between 1.5D and 3D. The bubbles and the water flow around the cylinders are visualized, and the bubble velocity distribution is measured. The experiments reveal the water and bubble shear layers originating at the sides of the lower cylinder, and allow the elucidation of their behavior around the upper cylinder. Furthermore, this study makes clear the effects of L on the flow around the two cylinders, such as the stagnant bubbly flow and the bubbly wake.

    DOI: 10.1115/AJKFluids2019-4971

    Scopus

  228. Development of a propeller-type hollow micro-hydraulic turbine with excellent performance in passing foreign matter 査読有り

    Uchiyama T.

    Renewable Energy   126 巻   頁: 545 - 551   2018年10月

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Renewable Energy  

    DOI: 10.1016/j.renene.2018.03.083

    Web of Science

    Scopus

  229. Improvements to the convection scheme in the vortex particle method using a semi-Lagrangian method

    Degawa Tomohiro, Uchiyama Tomomi

    JOURNAL OF ALGORITHMS & COMPUTATIONAL TECHNOLOGY   12 巻 ( 3 ) 頁: 223 - 233   2018年9月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Journal of Algorithms and Computational Technology  

    This study focuses on the convection scheme in the vortex particle method. The usual two-step convection procedure for vortex elements, which comprises the convection of vortex elements on each grid point and redistribution of vorticity into each grid point, is extremely difficult to parallelize because of unavoidable memory-write conflictions in the redistribution step, thereby limiting the computational speed. We apply a semi-Lagrangian method called the cubic semi-Lagrangian method, as the convection scheme in the vortex particle method to improve space–time accuracy and accelerate computations. Two test problems, namely the Taylor–Green vortex and double shear flow, are simulated using the semi-Lagrangian vortex particle method proposed in this study to confirm its suitability. The results show that the accuracy of capturing standing vortices and the total amount of kinetic energy conservation are significantly improved. The performance measurements show that the average execution time for the convection of vortex elements is reduced to one-half, thus verifying the semi-Lagrangian method as a suitable convection scheme for the vortex particle method.

    DOI: 10.1177/1748301818771811

    Web of Science

    Scopus

  230. Mixing of density-stratified fluid in a cylindrical tank by a diagonal jet 査読有り

    Tomohiro Degawa, Kota Uno, Tomomi Uchiyama

    Journal of Energy and Power Engineering   12 巻   頁: 436-443   2018年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

  231. Mixing of density-stratified fluid in a cylindrical tank by a diagonal jet 査読有り

    Tomohiro Degawa, Kota Uno, Tomomi Uchiyama

    Journal of Energy and Power Engineering   12 巻   頁: 436-443   2018年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

  232. マイクロバブルプルームの内部を落下する球形粒子の運動と粒子まわりのマイクロバブルの挙動

    内山 知実, 川崎 雄次郎, 出川 智啓

    流体工学部門講演会講演論文集   2018 巻 ( 0 ) 頁: OS5 - 20   2018年

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    掲載種別:研究論文(学術雑誌)   出版者・発行元:一般社団法人 日本機械学会  

    <p>This study conducts experimental exploration on the motion of a solid spherical particle falling in a microbubble plume and the bubble behavior around the particle. Bubbles with a mean diameter of 0.037 mm, released into a rectangular conduit using the electrolysis of water, rise by the buoyant force and induce a bubble plume. A spherical particle with a diameter 11.1 mm and density 1130 kg/m<sup>3</sup> is released from the top of the conduit. The experiment clarifies that the particle falls meandering through the plume and that the terminal velocity is almost the same as that for a particle falling in quiescent water. The experiment also makes clear that the bubbles separate from the particle surface and that the separation induces a stagnation area just behind the particle. A wake still exists at a location with a distance of three times of the particle diameter from the particle.</p>

    DOI: 10.1299/jsmefed.2018.OS5-20

  233. マイクロバブルプルームの内部における球形粒子の運動と粒子まわりの気泡の挙動

    内山 知実, 出川 智啓, 川崎 雄次郎

    年次大会   2018 巻 ( 0 )   2018年

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    掲載種別:研究論文(学術雑誌)   出版者・発行元:一般社団法人 日本機械学会  

    <p>This study investigates the motion of a spherical particle in microbubble plume and the bubble behavior around the particle. Microbubbles with a mean diameter of 0.037 mm, released into a rectangular conduit using the electrolysis of water, rise by the buoyant force and induce a bubble plume in the conduit. A spherical particle with a diameter 10 mm and a density 1022 kg/m<sup>3</sup> is placed on a mesh stretched near the bottom of the conduit at the commencement of the microbubble release from the cathode. The experiments clarify the effects of the bubble volumetric flux on the motion of the particle. They also explore the bubble distribution and velocity around the rising, still and lowering particle to make clear the front stagnation and wake of the particle.</p>

    DOI: 10.1299/jsmemecj.2018.S0510401

  234. Vortex In Cell法による振動円柱周りの流れの数値シミュレーション

    出川 智啓, 谷 強, 内山 知実

    年次大会   2018 巻 ( 0 )   2018年

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    掲載種別:研究論文(学術雑誌)   出版者・発行元:一般社団法人 日本機械学会  

    <p>In the present study, we propose a method for calculating the fluid dynamic forces acting on bodies in a two-dimensional simulation of a flow around a moving body by using the vortex–in–cell method. The body is represented using the volume penalization method which introduces the influence of the body on the flow as an external force in the form of a penalization term into the Navier–Stokes equation. The pressure field is computed by solving the Poisson equation, which is derived by obtaining the divergence of the Navier-Stokes equation. The pressure and viscous stress on the body surface are obtained from a quadratic function along the vector normal to the surface. A flow around a circular cylinder oscillating in still water is simulated, and the fluid dynamic force acting on the cylinder is calculated using the proposed method. The velocity profiles across four cross-sections at three different time points agree well with the results of a measurement conducted using a laser Doppler velocimeter. The in-line force acting on the cylinder agrees with the results of the simulations performed using the boundary-conforming formulation.</p>

    DOI: 10.1299/jsmemecj.2018.S0510105

  235. Numerical simulation of jet issuing diagonally upward into density-stratified fluid in cylindrical tank 査読有り

    Degawa, T, Uchiyama, T, Aozasa, I, Ishikawa, A, Motoyama, K

    J. Power and Energy Eng.   6 巻 ( 3 ) 頁: 38-52   2018年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

  236. Control of air bubble cluster by a vortex ring launched into still water 査読有り

    Uchiyama, T, Kusamichi, S

    Int. J. Chemical Engineering and Applications   8 巻 ( 1 ) 頁: 37-46   2017年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

  237. 密度界面に衝突する渦輪の数値シミュレーション

    伊藤 丈矩, 出川 智啓, 内山 知実, 角田 博之

    年次大会   2017 巻 ( 0 )   2017年

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    掲載種別:研究論文(学術雑誌)   出版者・発行元:一般社団法人 日本機械学会  

    <p>This study simulates the behavior of a vortex ring launched toward the interface of a two-layer density stratified fluid and the resulting mixing phenomena between the fluids. Initially, the density-stratified fluid is in a static condition in a tank. The upper and lower fluids are glycerol aqueous solution and an aqueous solution of potassium dihydrogen phosphate, respectively. The vortex ring with a diameter of 26.4 mm is launched vertically downward from the upper fluid region. It travels by the vertical motion toward the density interface. The Reynolds number, based on the circulation of the vortex ring, is 3500. The simulation conditions are parallel with an experimental work of one of the authors. The vortex in cell method, which was presented by the authors for flow simulations of two-layer density stratified fluid in a prior study, is used. The simulation favorably highlights the collision, deformation and penetration of the vortex ring at the density interface. It also successfully reveals the mixing between the upper and lower fluids induced by the motion of the vortex ring. These simulated results are discussed by comparing with the corresponding experimental ones.</p>

    DOI: 10.1299/jsmemecj.2017.S0520406

  238. 密度成層流体中に射出された複数の渦輪による撹拌の数値シミュレーション

    出川 智啓, 内山 知実

    年次大会   2017 巻 ( 0 )   2017年

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    掲載種別:研究論文(学術雑誌)   出版者・発行元:一般社団法人 日本機械学会  

    <p>This study numerically investigates the mixing of a two-layer density stratified fluid caused by vortex rings. Initially, the density-stratified fluid is in a static condition in a tank. The upper and lower fluids are glycerol aqueous solution and an aqueous solution of potassium dihydrogen phosphate, respectively. Two vortex rings are arranged on a vertical line in the lower fluid, and the axial interval is 80 mm. The diameter of the vortex ring is 26.4 mm, and the Reynolds numbers based on the circulation are 4000, 6000, and 8000. The vortex rings are launched simultaneously in the vertically upward direction. The simulation explores the collision of the vortex rings with the density interface, the entrainment of the fluids into the vortex rings, and the resulting mixing between the fluids. It also clarifies the behavior of each vortex ring, such as the deformation and the interaction with the density interface.</p>

    DOI: 10.1299/jsmemecj.2017.S0520405

  239. Behavior of a jet issuing diagonally upward into two-layer density-stratified fluid in a cylindrical tank 査読有り

    Degawa, T, Fukue, S, Uchiyama, T, Ishikawa, A, Motoyama, K

    J. Flow Control, Measurement & Visualization   5 巻   頁: 51-64   2017年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

  240. Generation and transport of solid particle clusters using a vortex ring launched into water 査読有り

    Uchiyama, T, Yano, C, Degawa, T

    Int. J. Chemical Engineering and Applications   8 巻 ( 4 ) 頁: 253-260   2017年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

  241. A Feasibility Study of Power Generation from Sewage Using a Hollowed Pico-Hydraulic Turbine

    Uchiyama Tomomi, Honda Satoshi, Okayama Tomoko, Degawa Tomohiro

    ENGINEERING   2 巻 ( 4 ) 頁: 510 - 517   2016年12月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Engineering  

    This study is concerned with the feasibility of power generation using a pico-hydraulic turbine from sewage flowing in pipes. First, the sewage flow rate at two connection points to the Toyogawa River-Basin Sewerage, Japan, was explored for over a year to elucidate the hydraulic energy potential of the sewage. Second, the performance of the pico-hydraulic turbine was investigated via laboratory experiments that supposed the turbine to be installed in the sewage pipe at the connection points. This study indicates that the connection points have hydraulic potential that can be used for power generation throughout the year. It also demonstrates that the pico-hydraulic turbine can be usefully employed for power generation from sewage flowing in the pipe at the connection points.

    DOI: 10.1016/J.ENG.2016.04.007

    Web of Science

    Scopus

  242. Numerical simulation of the interactions between a vortex ring and solid particles suspended above a horizontal wall

    Uchiyama Tomomi, Shimada Seiji

    POWDER TECHNOLOGY   301 巻   頁: 966 - 980   2016年11月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Powder Technology  

    The interactions between a vortex ring and solid particles near a horizontal wall in the air are explored in this study using numerical simulations. The vortex ring is moved toward the particles initially arranged in layers above the wall. The Reynolds number of the vortex ring is 1146. When the Stokes number St is 0.1, the particles initially arranged around the central axis of the vortex ring are driven toward the wall while moving in the radial direction. They distribute circularly along the outer edge of the particle cluster on the wall. The particles near the layer's edge are whirled up. Three-dimensional vortex structures, including secondary and tertiary vortex rings, are produced around the particles. When St = 1, vortical flows induced around the particles appear in the broader region. They reduce rapidly owing to the motion of particles relative to the wall (collision and rebound). The drag force acting on the particles lowers the strength of the vortex ring and also suppresses the approach of the vortex ring toward the wall.

    DOI: 10.1016/j.powtec.2016.07.042

    Web of Science

    Scopus

  243. Numerical simulation of flow around two tandem cylinders by vortex in cell method combined with immersed boundary method

    Van Luc N., Zuhal L.R., Uchiyama T.

    Advances and Applications in Fluid Mechanics   19 巻 ( 4 ) 頁: 787 - 810   2016年10月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Advances and Applications in Fluid Mechanics  

    This study is concerned with the numerical simulation of incompressible flows around two circular cylinders in tandem arrangement. A vortex in cell (VIC) method combined with an immersed boundary (IB) method is applied to the simulation. The Reynolds number Re, based on the diameter D of cylinder and the flow velocity upstream of the front cylinder, ranges from 200 to 9500. The distance L between the cylinders is varied from 1.5D to 8D. The simulated flow characteristics, such as the behavior of the shear layers separated from the cylinders, the vortex shedding and the fluid forces acting on the cylinders, are favorably compared with the existing results. The simulation can also successfully analyze the effects of Re and L on the flow characteristics. These simulation results demonstrate that the VIC method combined with the IB method is usefully applicable to the simulation of incompressible flows around two tandem cylinders.

    DOI: 10.17654/FM019040787

    Scopus

  244. Study of the interactions between rising air bubbles and vortex core of swirling water flow around vertical axis

    Uchiyama Tomomi, Ishiguro Yukihiro

    CHEMICAL ENGINEERING SCIENCE   142 巻   頁: 137 - 143   2016年3月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Chemical Engineering Science  

    The interactions between rising air bubbles and the vortex core of swirling water flows in a cylindrical tank are experimentally investigated. A stirring disc mounted at the center of the tank bottom is rotated to produce swirling water flows around the central (vertical) axis of the tank, and small air bubbles are successively released from tubules mounted near the stirring disc. The bubbles rise helically in the swirling water flow because of the buoyancy force, and some bubbles are entrained into the vortex core. The precessional amplitude of the vortex core is enhanced by the bubbles when the bubble flow rate Qg is very low. But it decreases with increasing Qg when Qg is larger than a certain value. In the horizontal cross-sections near the stirring disc, the bubbles make the water flow field nonaxisymmetric and reduce the water velocity. The water velocity variation due to the bubbles affects the shape of the vortex funnel formed at the water surface.

    DOI: 10.1016/j.ces.2015.11.042

    Web of Science

    Scopus

  245. A feasibility study of power generation from sewage using a hollowed pico-hydraulic turbine 査読有り

    Uchiyama, T, Honda, T, Okayama, T, Degawa, T

    Engineering   2 巻   頁: 510-517   2016年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

  246. 円筒容器内の密度成層流体に対する斜め噴流による混合の数値シミュレーション

    内山 知実, 青笹 功, 石川 明, 本山 浩二

    流体工学部門講演会講演論文集   2016 巻 ( 0 )   2016年

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    掲載種別:研究論文(学術雑誌)   出版者・発行元:一般社団法人 日本機械学会  

    <p>Mixing phenomena, induced by a jet issued diagonally upward into a two-layer densitystratified fluid in a cylindrical tank, are numerically simulated. The upper and lower fluids are water and a NaCl aqueous solution, respectively. The mass concentration of the NaCl-water solution is 0.02. The lower fluid is issued from a nozzle mounted on the tank bottom. The angle of the nozzle to the tank bottom is 60 degree, and the Reynolds number defined by the jet velocity and the nozzle diameter ranges from 475 to 3089. The simulation highlights the jet behavior relative to the density interface and the resultant mixing phenomena.</p>

    DOI: 10.1299/jsmefed.2016.0207

  247. Study of the interactions between rising air bubbles and vortex core of swirling water flow around vertical axis 査読有り

    Uchiyama, T, Ishiguro, Y

    Chemical Engineering Science   142 巻   頁: 137-143   2016年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

  248. SIMULATION OF JET ISSUED INTO TWO-LAYER DENSITY-STRATIFIED FLUID BY VORTEX IN CELL METHOD COMBINED WITH IMMERSED BOUNDARY METHOD

    Aozasa Isao, Uchiyama Tomomi

    PROCEEDINGS OF THE ASME/JSME/KSME JOINT FLUIDS ENGINEERING CONFERENCE, 2015, VOL 1A, SYMPOSIA, PT 2     2016年

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    掲載種別:研究論文(学術雑誌)  

    Web of Science

  249. Numerical simulation of the interactions between a vortex ring and solid particles suspended above a horizontal wall 査読有り

    Uchiyama, T, Shimada, S

    Powder Technology   301 巻   頁: 966-980   2016年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

  250. Experimental study of flow around a circular cylinder inside a bubble plume 査読有り

    Uchiyama, T, Ishiguro, Y

    Advances in Chem. Eng. Sci.   6 巻   頁: 269-280   2016年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

  251. Effects of clearance between rotor and ground on the performance of an open cross-flow-type nano-hydraulic turbine 査読有り

    Uchiyama, T, Mizoguchi, S, Iio, S, Katayama, Y, Ikeda, T

    J. Energy and Power Engineering   10 巻   頁: 465-473   2016年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

  252. Cahn-Hilliard方程式に対する格子ボルツマン法の精度評価

    瀬田 剛, 内山 知実, 高野 登

    計算力学講演会講演論文集   2016 巻 ( 0 )   2016年

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    掲載種別:研究論文(学術雑誌)   出版者・発行元:一般社団法人 日本機械学会  

    DOI: 10.1299/jsmecmd.2016.29.050

  253. Study of the Interactions between Rising Air Bubbles and Vortex Core of Swirling Water Flow around Vertical Axis

    内山 知実, 石黒 幸弘

    年次大会   2016 巻 ( 0 )   2016年

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:一般社団法人 日本機械学会  

    <p>The interactions between rising air bubbles and the vortex core of swirling water flows in a cylindrical tank are experimentally investigated. A stirring disc mounted at the center of the tank bottom is rotated to produce swirling water flows around the central (vertical) axis of the tank, and small air bubbles are successively released from tubules mounted near the stirring disc. The bubbles rise helically in the swirling water flow because of the buoyancy force, and some bubbles are entrained into the vortex core. The precessional amplitude of the vortex core is enhanced by the bubbles when the bubble flow rate <i>Q</i><sub>g</sub> is very low. But it decreases with increasing <i>Q</i><sub>g</sub> when <i>Q</i><sub>g</sub> is larger than a certain value. In the horizontal cross-sections near the stirring disc, the bubbles make the water flow field non- axisymmetric and reduce the water velocity.</p>

    DOI: 10.1299/jsmemecj.2016.S0520304

  254. Numerical study on the flow and performance of an open cross-flow mini-hydraulic turbine

    Uchiyama Tomomi, Uehara Shou, Fukuhara Haruki, Iio Shouichiro, Ikeda Toshihiko

    PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART A-JOURNAL OF POWER AND ENERGY   229 巻 ( 8 ) 頁: 968 - 977   2015年12月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy  

    This study simulates the flow through a small-scale open cross-flow hydraulic turbine and analyzes the turbine's performance. The simulation employs a two-dimensional particle method that was used for the simulation of a small-scale impulse-type hydraulic turbine in a prior study. Flow in the turbine is successfully simulated, with the simulated turbine performance showing good agreement with experimental measurements. The simulations also clarify that the deterioration in performance with increasing water flow rate is caused by the degeneration of the radially outward flow between the rotor blades.

    DOI: 10.1177/0957650915592260

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  255. Investigation of Blade Angle of an Open Cross-Flow Runner

    Katayama Yusuke, Iio Shouichiro, Veerapun Salisa, Uchiyama Tomomi

    INTERNATIONAL JOURNAL OF TURBO & JET-ENGINES   32 巻 ( 1 ) 頁: 65 - 72   2015年4月

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:International Journal of Turbo and Jet Engines  

    The aim of this study was to develop a nano-hydraulic turbine utilizing drop structure in irrigation channels or industrial waterways. This study was focused on an open-type cross-flow turbine without any attached equipment for cost reduction and easy maintenance. In this study, the authors used an artificial indoor waterfall as lab model. Test runner which is a simple structure of 20 circular arc-shaped blades sandwiched by two circular plates was used The optimum inlet blade angle and the relationship between the power performance and the flow rate approaching theoretically and experimentally were investigated. As a result, the optimum inlet blade angle due to the flow rate was changed. Additionally, allocation rate of power output in 1st stage and 2nd stage is changed by the blade inlet angle.

    DOI: 10.1515/tjj-2015-0005

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  256. 0210 円筒容器内の密度成層流体中に噴射された噴流のシミュレーション

    青笹 功, 内山 知実

    流体工学部門講演会講演論文集   2015 巻 ( 0 ) 頁: _0210 - 1_-_0210-5_   2015年

     詳細を見る

    掲載種別:研究論文(学術雑誌)   出版者・発行元:一般社団法人 日本機械学会  

    This study is concerned with the numerical simulation of the jet issued into two-layer density-stratified fluid in a cylindrical tank. Vortex in cell (VIC) method combined with an Immersed Boundary (IB) method is applied to the simulation. The upper and lower fluids are water and a NaCl-water solution, respectively, and the lower fluid is issued vertically upward from a nozzle on the bottom of the tank. The Reynolds number Re defined by the jet velocity and the nozzle diameter ranges from 95 to 1188, and the mass concentration of the NaCl-water solution is set at 0.02. The simulation highlights that the jet behavior relative to the density interface and the resultant mixing phenomena depend on Re. Such simulated results are confirmed to agree well with the experimentally visualized ones, demonstrating the validity of the present simulation method.

    DOI: 10.1299/jsmefed.2015._0210-1_

  257. S0510402 気泡プルームの内部に置かれた円柱周りの流れに関する実験的研究

    内山 知実, 石黒 幸広

    年次大会   2015 巻 ( 0 ) 頁: _S0510402 - -_S0510402-   2015年

     詳細を見る

    掲載種別:研究論文(学術雑誌)   出版者・発行元:一般社団法人 日本機械学会  

    This study explores the bubble plume around a circular cylinder in a water tank. Small gas bubbles with diameter of less than 0.06 mm are released from electrodes on the bottom of the tank by using the electrolysis of water. They induce the water flow with rising by the buoyant force. In such bubble plume, a circular cylinder with diameter D of 30 mm is mounted at an elevation of 6.5D above the electrodes. This study visualizes the bubbles and water flow around the cylinder and measures the bubble velocity distribution. The experiment elucidates the separated shear layers originating from the cylinder wall, their roll-up, and the bubble entrainment in the resultant large-scale eddies behind the cylinder.

    DOI: 10.1299/jsmemecj.2015._S0510402-

  258. Numerical study on the flow and performance of an open cross-flow mini-hydraulic turbine 査読有り

    Uchiyama, T, Uehara, S, Fukuhara, H, Iio, S, Ikeda, T

    J. Power and Energy, Proc. IMechE Part A   229 巻 ( 8 ) 頁: 968-977   2015年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)  

  259. Numerical simulation of jet flow issued into density-stratified fluid by vortex in cell method

    Shakouchi S., Shimada S., Uchiyama T.

    Advances and Applications in Fluid Mechanics   17 巻 ( 1 ) 頁: 115 - 134   2015年

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Advances and Applications in Fluid Mechanics  

    This study proposes a numerical simulation method for a jet flow issued into a two-layer density-stratified fluid. The method is based on the Vortex in Cell method, which discretizes the vorticity field into vortex elements and computes the time evolution of the flow by tracing the convection of each vortex element using the Lagrangian approach. The proposed method is applied to simulate a jet flow, which was experimentally investigated in the authors’ prior study, so as to demonstrate the validity of the method. The simulation highlights that the jet behavior relative to the density interface depends on the jet Reynolds number and that it agrees well with the experimentally visualized one.

    DOI: 10.17654/15-aafm-01701-115

    Scopus

  260. Numerical simulation of bubbly flow by vortex in cell method

    Uchiyama Tomomi, Yoshii Yutaro

    IUTAM SYMPOSIUM ON PARTICLE METHODS IN FLUID DYNAMICS   18 巻   頁: 138 - 147   2015年

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Procedia IUTAM  

    A vortex in cell (VIC) method for bubbly flow is proposed. It computes the time evolution of the flow by calculating the behavior of the vortex element as well as the bubble motion with the Lagrangian approach. The proposed method is also applied to simulate a bubble plume to demonstrate the validity. In a tank containing water, small air bubbles are released from the base of the tank. The bubbles rise due to the buoyant force, inducing the water flow around them. The simulation for the plume at the starting period highlights that the rising bubbles induce vortex rings at their top and that a bubble cluster appears owing to the entrainment of the bubbles into the vortex rings. The rising velocity for the top of the bubbles is proportional to the square root for the flow rate of the released bubbles, being consistent with an existing theoretical investigation. The simulation also demonstrates that the developed bubble plume having jet characteristics is successfully captured.

    DOI: 10.1016/j.piutam.2015.11.014

    Web of Science

    Scopus

  261. Numerical simulation of bubbly flow by an improved vortex in cell method

    Uchiyama T., Yoshii Y., Chen B., Wang Z.

    Advances and Applications in Fluid Mechanics   17 巻 ( 1 ) 頁: 91 - 114   2015年

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Advances and Applications in Fluid Mechanics  

    A simulation method for gas-liquid bubbly flows entraining small bubbles is proposed. It is based on the Vortex in Cell (VIC) method originally presented to simulate incompressible single-phase flows. The staggered grid discretization method and the vorticity correction method, which were proposed for the VIC method simulating single-phase flows by the authors’ prior study, are employed. The liquid velocity field is discretized with vortex elements, and the time evolution of the bubbly flow is simulated by calculating the behavior of each vortex element and the bubble motion through the Lagrangian approach. The proposed method is applied to the simulation of a bubble plume in a water tank to discuss the validity and applicability. Small air bubbles are released successively from the base of the tank, and their rise due to the buoyant force induces the water flow around them. The simulation at the starting period of the bubble release highlights that the rising bubbles induce vortex rings at their top and that a bubble cluster appears owing to the entrainment of the bubbles into the vortex rings. The rising velocity of the top of the bubbles is proportional to the square-root of the flowrate of the released bubbles, being consistent with the existing theoretical and numerical investigations. The simulation also demonstrates that the developed bubble plume having jet characteristics is successfully captured.

    DOI: 10.17654/15-aafm-01701-091

    Scopus

  262. Development of a non-clogging micro-hydraulic turbine of propeller type

    Uchiyama T., Nishida Y., Ide Y.

    ICOPE 2015 - International Conference on Power Engineering     2015年

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:ICOPE 2015 - International Conference on Power Engineering  

    This study is concerned with the development of a hollow micro-hydraulic turbine excellent in foreign matter passage performance. The runner has a circular hollow around the central (rotating) axis so that foreign matter included in water can easily flow without blocking the turbine. The laboratory experiments are conducted to investigate the turbine performance. The guide vane successfully heightens the turbine efficiency. Though the maximum efficiency decreases with increasing the hollow ratio ϵ when ϵ>0.25, it remains unchanged when ϵ≤ 0.25. The hollow of the runner effectively heightens the passage performance of the polyester fibers entrained into the turbine. When employing the guide vane, the developed micro-hydraulic turbine of ϵ≥0.375 is not blocked by the fibers and maintains its function.

    Scopus

  263. 402 無閉塞型マイクロプロペラ水車の開発(新エネルギー(1))

    内山 知実, 井手 由紀雄, 岡山 朋子

    環境工学総合シンポジウム講演論文集   2015 巻 ( 0 ) 頁: 143 - 146   2015年

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    掲載種別:研究論文(学術雑誌)   出版者・発行元:一般社団法人 日本機械学会  

    This study is concerned with the development of a hollow micro-hydraulic turbine excellent in foreign matter passage performance. The runner has a circular hollow around the central (rotating) axis so that foreign matter included in water can easily flow without blocking the turbine. The laboratory experiments are conducted to investigate the turbine performance. Though the turbine efficiency decreases with increasing the hollow ratio e when ε>0.25, it remains unchanged when ε&le;0.25. The hollow of the runner effectively heightens the passage performance of the polyester fibers entrained into the turbine. The developed micro-hydraulic turbine of ε&ge;0.375 is not blocked by the fibers and maintains its function.

    DOI: 10.1299/jsmeenv.2015.25.143

  264. ICOPE-15-1101 Development of a non-clogging micro-hydraulic turbine of propeller type

    UCHIYAMA Tomomi, NISHIDA Yoshihiro, IDE Yukio

    Proceedings of the International Conference on Power Engineering : ICOPE   2015 巻 ( 0 ) 頁: _ICOPE - 15--_ICOPE-15-   2015年

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    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:一般社団法人 日本機械学会  

    This study is concerned with the development of a hollow micro-hydraulic turbine excellent in foreign matter passage performance. The runner has a circular hollow around the central (rotating) axis so that foreign matter included in water can easily flow without blocking the turbine. The laboratory experiments are conducted to investigate the turbine performance. The guide vane successfully heightens the turbine efficiency. Though the maximum efficiency decreases with increasing the hollow ratio ε when ε>0.25, it remains unchanged when ε≦0.25. The hollow of the runner effectively heightens the passage performance of the polyester fibers entrained into the turbine. When employing the guide vane, the developed micro-hydraulic turbine of ε≧0.375 is not blocked by the fibers and maintains its function.

    DOI: 10.1299/jsmeicope.2015.12._ICOPE-15-_70

  265. Simulation of jet issued into two-layer density-stratified fluid by vortex in cell method combined with immersed boundary method

    Aozasa I., Uchiyama T.

    ASME/JSME/KSME 2015 Joint Fluids Engineering Conference, AJKFluids 2015   1A 巻   2015年

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    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:ASME/JSME/KSME 2015 Joint Fluids Engineering Conference, AJKFluids 2015  

    Jet flow issued into two-layer density-stratified fluid in a cylindrical tank is numerically simulated. Vortex in cell (VIC) method combined with an Immersed Boundary (IB) method, which is presented by the current authors, is applied to the simulation. The upper and lower fluids are water and a NaCl-water solution, respectively, and the lower fluid is issued vertically upward from a nozzle on the bottom of the tank. The Reynolds number Re defined by the jet velocity and the nozzle diameter ranges from 95 to 1188, and the mass concentration of the NaCl-water solution Co is set at 0 and 0.02. The simulation highlights that the jet behavior relative to the density interface and the resultant mixing phenomena depend on Re. Such simulated results are confirmed to agree well with the experimentally visualized ones, demonstrating the validity of the present simulation method.

    DOI: 10.1115/ajkfluids2015-24394

    Scopus

  266. Numerical Simulation of Entrainment and Transport of Gas Bubbles by Vortex in Cell Method 招待有り 査読有り

    Uchiyama, T. and Yoshii, Y

        頁: on USB flash drive   2011年7月

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    担当区分:筆頭著者   記述言語:英語  

  267. Vortex Simulation for Bahavior of Solid Particles Falling in Air 査読有り

    Yagami, H. and Uchiyama, T.

    Proc. ASME-JSME-KSME Joint Fluids Engineering Conference 2011     頁: on USB flash drive   2011年7月

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    記述言語:英語  

  268. Vortex in Cell法による気泡流の数値シミュレーション 査読有り

    内山知実,吉井佑太郎

    日本機械学会論文集B編   77 巻 ( 778 ) 頁: 1301-1313   2011年

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    担当区分:筆頭著者   記述言語:日本語   掲載種別:研究論文(学術雑誌)  

▼全件表示

書籍等出版物 4

  1. 有限要素法による計算流体力学 -解説編-

    内山知実( 担当: 単著)

    T&Mソリューションズ  2008年1月 

     詳細を見る

    記述言語:日本語

  2. 有限要素法による計算流体力学 -プログラム編-

    内山知実( 担当: 単著)

    T&Mソリューションズ  2008年1月 

     詳細を見る

    記述言語:日本語

  3. Javaによる連続体力学の有限要素法

    内山知実( 担当: 単著)

    森北出版  2001年11月 

     詳細を見る

    記述言語:日本語

    本書は,有限要素法の基本的な考え方を説明するとともに.連続体力学が対象とする様々な解析.すなわち構造解析.流体解析,熱流体連成解析,構造流体連成解析への適用を通して具体的な手法(定式化,離散化,マトリクス計算など)を解説する.

  4. 情報メディア教育システムハンドブック

    ( 担当: 共著)

    昭晃堂  2001年4月 

     詳細を見る

    記述言語:日本語

MISC 10

  1. Numerical simulation of jet issuing diagonally upward into density-stratified fluid in cylindrical tank 査読有り

    Degawa, T, Uchiyama, T, Aozasa, I, Ishikawa, A, Motoyama, K  

    J. Power and Energy Eng.6 巻 ( 3 ) 頁: 38-52   2018年

     詳細を見る

    記述言語:英語   掲載種別:速報,短報,研究ノート等(学術雑誌)  

  2. Smoothed profile-lattice Boltzmann method for non-penetration and wetting boundary conditions in two and three dimensions 査読有り

    Takeshi Seta, Tomomi Uchiyama, Noboru Takano  

    COMPUTERS & FLUIDS159 巻   頁: 64 - 80   2017年12月

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    記述言語:英語   掲載種別:速報,短報,研究ノート等(学術雑誌)   出版者・発行元:PERGAMON-ELSEVIER SCIENCE LTD  

    In this study, the smoothed profile-lattice Boltzmann method (SP-LBM) is proposed to determine the contact line dynamics on a hydrophobic or a hydrophilic curved wall. Two types of smoothed indicator functions are introduced, namely a function that identifies the solid domain for non-slip and non-penetration conditions and a function that denotes the boundary layer for no mass-flux and the wetting boundary conditions. In order to prevent fluid penetration into the solid boundary, the fluid-solid interaction force is computed based on the definition of the fluid velocity as proposed by Guo et al. [1]. In order to implement the Neumann boundary conditions for the order parameter and the chemical potential, the fluxes from the solid surfaces are distributed to relevant physical valuables through a smoothed profile. Several two-dimensional and three-dimensional numerical investigations including those determining the Couette flows, flow around a circular cylinder, transition layer on a wetting boundary, and dynamic behavior of a droplet on a flat or curved plate demonstrate the efficiency of the present method in calculating the contact angle of a droplet on curved surfaces with wall impermeability. The present model provides a simple algorithm to compute the surface normal vector and contact line dynamics on an arbitrarily shaped boundary by using a smoothed-profile. (C) 2017 Elsevier Ltd. All rights reserved.

    DOI: 10.1016/j.compfluid.2017.09.012

    Web of Science

  3. Behavior of a jet issuing diagonally upward into two-layer density-stratified fluid in a cylindrical tank 査読有り

    Degawa, T, Fukue, S, Uchiyama, T, Ishikawa, A, Motoyama, K  

    J. Flow Control, Measurement & Visualization5 巻   頁: 51-64   2017年

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    記述言語:英語   掲載種別:速報,短報,研究ノート等(学術雑誌)  

  4. Generation and transport of solid particle clusters using a vortex ring launched into water 査読有り

    Uchiyama, T, Yano, C, Degawa, T  

    Int. J. Chemical Engineering and Applications8 巻 ( 4 ) 頁: 253-260   2017年

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    記述言語:英語   掲載種別:速報,短報,研究ノート等(学術雑誌)  

  5. Control of air bubble cluster by a vortex ring launched into still water 査読有り

    Uchiyama, T, Kusamichi, S  

    Int. J. Chemical Engineering and Applications8 巻 ( 1 ) 頁: 37-46   2017年

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    記述言語:英語   掲載種別:速報,短報,研究ノート等(学術雑誌)  

  6. Study of the interactions between rising air bubbles and vortex core of swirling water flow around vertical axis 査読有り

    Uchiyama, T, Ishiguro, Y  

    Chemical Engineering Science142 巻   頁: 137-143   2016年

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    記述言語:英語   掲載種別:速報,短報,研究ノート等(学術雑誌)  

  7. Numerical simulation of the interactions between a vortex ring and solid particles suspended above a horizontal wall 査読有り

    Uchiyama, T, Shimada, S  

    Powder Technology301 巻   頁: 966-980   2016年

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    記述言語:英語   掲載種別:速報,短報,研究ノート等(学術雑誌)  

  8. Experimental study of flow around a circular cylinder inside a bubble plume 査読有り

    Uchiyama, T, Ishiguro, Y  

    Advances in Chem. Eng. Sci.6 巻   頁: 269-280   2016年

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    記述言語:英語   掲載種別:速報,短報,研究ノート等(学術雑誌)  

  9. Effects of clearance between rotor and ground on the performance of an open cross-flow-type nano-hydraulic turbine 査読有り

    Uchiyama, T, Mizoguchi, S, Iio, S, Katayama, Y, Ikeda, T  

    J. Energy and Power Engineering10 巻   頁: 465-473   2016年

     詳細を見る

    記述言語:英語   掲載種別:速報,短報,研究ノート等(学術雑誌)  

  10. Numerical study on the flow and performance of an open cross-flow mini-hydraulic turbine 査読有り

    Uchiyama, T, Uehara, S, Fukuhara, H, Iio, S, Ikeda, T  

    J. Power and Energy, Proc. IMechE Part A229 巻 ( 8 ) 頁: 968-977   2015年

     詳細を見る

    記述言語:英語   掲載種別:速報,短報,研究ノート等(学術雑誌)  

▼全件表示

講演・口頭発表等 5

  1. 非圧縮性二流体モデルの有限要素解析(上流化法およびALE法の適用)

     詳細を見る

    会議種別:口頭発表(招待・特別)  

    国名:日本国  

  2. 渦法による固気二相自由乱流の数値解析

     詳細を見る

    会議種別:口頭発表(招待・特別)  

    国名:日本国  

  3. 固気二相自由乱流の渦法解析

     詳細を見る

    会議種別:口頭発表(招待・特別)  

    国名:日本国  

  4. 渦法による固気二相自由乱流の数値シミュレーション

     詳細を見る

    会議種別:口頭発表(招待・特別)  

    国名:日本国  

  5. 固気二相自由乱流の渦法シミュレーション

     詳細を見る

    会議種別:口頭発表(招待・特別)  

    国名:日本国  

科研費 10

  1. 気液二相流の各相流量の同時測定のための電源自立型IoT流量計の開発

    研究課題/研究課題番号:21K03852  2021年4月 - 2024年3月

    科学研究費助成事業  基盤研究(C)

    内山 知実, 高牟禮 光太郎

      詳細を見る

    担当区分:研究代表者 

    配分額:4160000円 ( 直接経費:3200000円 、 間接経費:960000円 )

    気液二相流の気液を分離することなく,各相の流量を同時に測定できる流量計を開発する.その実装性と運用性を高めるため,自己発電機能とインターネットとの無線通信機能を付与する.タービン流量計,水力発電,IoT,機械学習の知見を総動員した研究である.ロータ回転数を測定し,その時間変化の特徴量(尖度,歪度,標準偏差,平均値)をニューラルネットワークに入力して各相流量を測定(同定)する,新奇な電源自立型のIoT流量計である.

  2. 渦輪による気泡塊の創成と輸送に関する研究

    2018年4月 - 現在

    科学研究費補助金  基盤研究(C)

      詳細を見る

    担当区分:研究代表者 

  3. サブミクロン凹凸表面上の微小液滴挙動のモデル化と計算技術の開発

    研究課題/研究課題番号:16K06070  2016年4月 - 2019年3月

    科学研究費助成事業  基盤研究(C)

    瀬田 剛, 内山 知実, 高野 登

      詳細を見る

    担当区分:研究分担者 

    格子ボルツマン法にSmoothed Profile Methodを適用することで、撥水性または親水性を有する曲面上の液体挙動の解析が可能な計算手法を提案した。本手法では、滑りなしと浸透なしの境界条件に対応した関数と、質量フラックスと接触角に対する境界条件に対応した関数の2種類の関数を用いる。固体壁からのフラックスを考慮し、オーダー・パラメータと化学ポテンシャルに対するノイマン境界条件を設定可能にした。固体壁への漏れがなく、曲面状の液滴の接触角が適切に設定されることが、数値計算により実証された。任意形状の固体壁に対する法線ベクトルと液滴の接触角とを計算出来る単純なアルゴリズムを提供出来た。
    実験では計測が困難なサブマイクロスケールにおける空気・水系二相流挙動の数値実験により、現象論的なアプローチに基づくCassie-Baxterの法則等を実証する点に学術的な特色がある。医療用部材の防汚処理から電子基盤の高詳細化に至るまで、超撥水技術には大きな市場規模が期待されているが、摩擦等への耐久性の問題から十分な実用化に結びついていない。サブマイクロスケールでの超撥水現象を解析出来れば、計算と実験との両面から、表面構造の撥水効果への影響を効率的に検証でき、耐久性を考慮した最適な表面微細構造を導き出すことで、超撥水技術の向上と実用化への貢献が期待される。

  4. 異物通過性に優れたマイクロプロペラ水車の開発

    2016年4月 - 2018年3月

    科学研究費補助金  挑戦的萌芽研究

    内山 知実

      詳細を見る

    担当区分:研究代表者 

  5. 渦輪による気泡群の生成と輸送に関する研究

    2013年4月 - 2016年3月

    科学研究費補助金  基盤研究(C)

      詳細を見る

    担当区分:研究代表者 

  6. 気泡噴流に対する三次元渦法の開発と並列計算システムの構築

    2007年4月 - 2009年3月

    科学研究費補助金  基盤研究(C)

    内山知実

      詳細を見る

    担当区分:研究代表者 

  7. 気泡噴流に対する三次元渦法の開発と並列計算システムの構築

    2004年4月 - 2006年3月

    科学研究費補助金  基盤研究(C)

    内山知実

      詳細を見る

    担当区分:研究代表者 

  8. 柱状物体まわりの気液二相流に対する三次元渦法の開発と実験による検証に関する研究

    2002年4月 - 2004年3月

    科学研究費補助金  基盤研究(C)

    内山知実

      詳細を見る

    担当区分:研究代表者 

  9. ニューラルナットワークを用いた気液二相流の流量測定エキスパートシステムの開発

    2000年4月 - 2002年3月

    科学研究費補助金  奨励研究

    内山知実

      詳細を見る

    担当区分:研究代表者 

  10. ニューラルネットワークを用いたポンプ系の異常運転診断法

    1995年4月 - 1996年3月

    科学研究費補助金  奨励研究

    内山知実

      詳細を見る

    担当区分:研究代表者 

▼全件表示

産業財産権 7

  1. 流動情報通信装置

    内山知実

     詳細を見る

    出願人:国立大学法人名古屋大学

    出願番号:2018-129481  出願日:2018年7月

    出願国:国内  

  2. 小型水力発電装置

    内山知実

     詳細を見る

    出願人:名古屋大学

    出願番号:2017-043135  出願日:2017年3月

    出願国:国内  

  3. 中空羽根車およびそれを用いた発電装置

    内山知実,井手由紀雄

     詳細を見る

    出願人:内山知実,井手由紀雄

    出願番号:特願2013-081716  出願日:2013年4月

    出願国:国内  

  4. グリッドフリー手法を用いた固気二相流シミュレーションプログラム及びそれを記憶した記憶媒体ならびに固気二相流シミュレーション装置

    内山知実

     詳細を見る

    出願人:内山知実

    出願番号:特願2008-030193  出願日:2008年2月

    出願国:国内  

  5. 気泡流の解析方法,気泡流シミュレーションプログラムおよびそれを記憶した記憶媒体ならびに気泡流シミュレーション装置

    内山知実,出川智啓

     詳細を見る

    出願人:国立大学法人名古屋大学

    出願番号:特願2004-272011  出願日:2004年9月

    特許番号/登録番号:特許第4032123号  登録日:2007年11月 

    出願国:国内  

    液相中に微小な気泡が存在し,相互作用を及ぼし合いながら流れる気泡流に対する,解析方法,シミュレーションプログラム,記憶媒体およびシミュレーション装置を発明した.

  6. 流動情報通信装置

    内山知実

     詳細を見る

    出願人:国立大学法人名古屋大学

    出願番号:2018-129481  出願日:2018年7月

  7. 小型水力発電装置

    内山知実

     詳細を見る

    出願人:名古屋大学

    出願番号:2017-043135  出願日:2017年3月

▼全件表示

 

担当経験のある科目 (本学) 1

  1. 情報リテラシー(文系)

    2011

担当経験のある科目 (本学以外) 2

  1. 計算流体工学

    2008年4月 - 2009年3月 名城大学)

  2. 計算流体工学

    2007年4月 - 2008年3月 名城大学)