Organization
Institute of Materials and Systems for Sustainability Division of Materials Research (DM) Assistant Professor
Graduate School
Graduate School of Informatics
Title
Assistant Professor
External link
DEGAWA Tomohiro
Degree
Degree 4
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博士（情報科学） （ 2008.3 名古屋大学 ）
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修士（情報科学） （ 2005.3 名古屋大学 ）
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学士（工学） （ 2003.3 大学評価・学位授与機構 ）
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準学士（機械工学） （ 2001.3 奈良工業高等専門学校 ）
Research Interests
Research Interests 14
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高性能計算
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数値シミュレーション
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最適設計
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高効率化
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クリーンエネルギ
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創エネ
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流体工学
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混相流
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高性能計算
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混相流工学
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流体力学
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気液二相流
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数値計算
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数値流体力学
Research Areas
Research Areas 2
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Informatics / High performance computing
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Manufacturing Technology (Mechanical Engineering, Electrical and Electronic Engineering, Chemical Engineering) / Fluid engineering
Current Research Project and SDGs
Current Research Project and SDGs 2
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流体エネルギを利用する創エネ機器の創造と高効率化
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産業用マルチスケール熱流体シミュレーション手法の開発とシミュレーション技術の包括的高度化
Research History
Research History 10
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Nagoya University Institute of Materials and Systems for Sustainability Assistant Professor
2024.7
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Country：Japan
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Toyota Systems corp. Simulation System Division Project Manager
2022.1 - 2024.6
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Nagoya University Institute of Materials and Systems for Sustainability Division of Materials Reserch
2019.4 - 2022.3
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Toyota Systems corp. Simulation System Division
2019.1 - 2021.12
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名古屋大学未来材料・システム研究所 システム創成部門変換システム部 助教
2016.10 - 2018.12
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Country：Japan
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Nagoya University Institute of Materials and Systems for Sustainability Assistant Professor
2016.10 - 2018.12
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株式会社トヨタコミュニケーションシステム エンジニアリングシステム本部ES4部 主任
2016.4 - 2016.9
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Country：Japan
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Nagaoka University of Technology Designated Associate Professor
2014.10 - 2016.3
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Country：Japan
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Numazu College of Technology Lecturer
2011.4 - 2014.9
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Country：Japan
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The University of Electro-Communications Assistant Professor
2008.4 - 2011.3
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Country：Japan
Education
Education 3
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Nagoya University Graduate School, Division of Information Science
2005.4 - 2008.3
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Country： Japan
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Nagoya University Graduate School, Division of Information Science
2003.4 - 2005.3
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Country： Japan
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Nara National College of Technology
2001.4 - 2003.3
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Country： Japan
Professional Memberships
Professional Memberships 6
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オープンCAE学会
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日本混相流学会
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THE JAPAN SOCIETY FOR INDUSTRIAL AND APPLIED MATHEMATICS
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情報処理学会
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日本機械学会
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日本計算工学会
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Committee Memberships
Committee Memberships 10
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日本機械学会 企業連携活性化WG幹事
2024.4
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Committee type：Academic society
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日本機械学会 流体工学部門広報委員会委員長
2024.4 - 2025.3
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Committee type：Academic society
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日本機械学会 流体工学部門広報委員会幹事
2023.4 - 2024.3
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Committee type：Academic society
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日本混相流学会 ダイバーシティ委員
2021.8
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Committee type：Academic society
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日本混相流学会 編集委員会委員
2018.8 - 2021.8
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Committee type：Academic society
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日本機械学会 流体工学部門広報委員会委員
2017.4
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Committee type：Academic society
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International Conference on Vortex Flows and Vortex Models Local Organizing Committee
2014.4 - 2015.3
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日本機械学会 噴流，後流，及びはく離流れ研究会幹事
2013 - 2022.4
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Committee type：Academic society
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日本混相流学会編集員会 委員
2010.4 - 2014.3
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Committee type：Academic society
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情報処理学会主催GPUチャレンジ2010実行委員会 委員
2010.4 - 2011.4
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Committee type：Academic society
Awards
Awards 2
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second prize in NEC supercomputer programming contest
2023.3
Tomohiro Degawa
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日本計算工学会論文奨励賞
2015.5 一般社団法人日本計算工学会 (10) 漸化式によるVortex-in-Cell法の渦要素－格子補間の高速化とその誤差評価
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Award type：Honored in official journal of a scientific society, scientific journal Country：Japan
Papers
Papers 38
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Takamure, K; Uchiyama, T; Degawa, T
APPLIED OCEAN RESEARCH Vol. 154 2024.11
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Authorship：Last author Language：English Publishing type：Research paper (scientific journal)
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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 Vol. 56 ( 5 ) page： 612 - 621 2021.9
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Cao, LL; Takamure, K; Degawa, T; Uchiyama, T
JOURNAL OF VISUALIZATION Vol. 24 ( 4 ) page： 683 - 697 2021.8
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Uchiyama, T; Gu, Q; Degawa, T; Iio, S; Ikeda, T; Takamure, K
RENEWABLE ENERGY Vol. 157 page： 482 - 490 2020.9
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Uchiyama, T; Kawasaki, Y; Degawa, T; Takamure, K
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART C-JOURNAL OF MECHANICAL ENGINEERING SCIENCE Vol. 234 ( 7 ) page： 1340 - 1350 2020.4
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Effect of cylinders on the characteristics of a fine-bubble plume Open Access
TAKAMURE Kotaro, DEGAWA Tomohiro, KANO Ryota, UCHIYAMA Tomomi
Journal of Fluid Science and Technology Vol. 15 ( 3 ) page： JFST0019 - JFST0019 2020
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Language：English Publishing type：Research paper (scientific journal) Publisher：The Japan Society of Mechanical Engineers
<p>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 <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>. 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 <i>L</i> on the characteristics of the fine-bubble plume, such as the stagnant bubbly flow and the bubbly wake around the cylinders.</p>
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TAKAMURE Kotaro, GU Qiang, DEGAWA Tomohiro, UCHIYAMA Tomomi, IIO Shouichiro, IKEDA Toshihiko
Transactions of the JSME (in Japanese) Vol. 86 ( 887 ) page： 20-00181 - 20-00181 2020
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Language：Japanese Publisher：The Japan Society of Mechanical Engineers
<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>
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Numerical simulation of bubbly flow around a cylinder by semi-Lagrangian-Lagrangian method
Nguyen, V; Degawa, T; Uchiyama, T; Takamure, K
INTERNATIONAL JOURNAL OF NUMERICAL METHODS FOR HEAT & FLUID FLOW Vol. 29 ( 12 ) page： 4660 - 4683 2019.12
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Degawa, T; Gu, Q; Uchiyama, T; Takamure, K
AEROSPACE SCIENCE AND TECHNOLOGY Vol. 94 2019.11
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Numerical simulation of the interaction between a vortex ring and a bubble plume
Nguyen, VL; Degawa, T; Uchiyama, T
INTERNATIONAL JOURNAL OF NUMERICAL METHODS FOR HEAT & FLUID FLOW Vol. 29 ( 9 ) page： 3192 - 3224 2019.9
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Numerical simulation of annular bubble plume by vortex in cell method
Nguyen, VL; Degawa, T; Uchiyama, T
INTERNATIONAL JOURNAL OF NUMERICAL METHODS FOR HEAT & FLUID FLOW Vol. 29 ( 3 ) page： 1103 - 1131 2019.3
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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
PROCEEDINGS OF THE ASME/JSME/KSME JOINT FLUIDS ENGINEERING CONFERENCE, 2019, VOL 5 2019
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TAKAMURE Kotaro, UCHIYAMA Tomomi, GU Qiang, DEGAWA Tomohiro, Iio Shouichiro, IKEDA Toshihiko
The Proceedings of Mechanical Engineering Congress, Japan Vol. 2019 ( 0 ) page： S05121 2019
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Language：Japanese Publisher：The Japan Society of Mechanical Engineers
<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>
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Flow around Two Circular Cylinders Placed Tandemly Inside a Microbubble Plume
UCHIYAMA Tomomi, KANO Ryota, DEGAWA Tomohiro, TAKAMURE Kotaro
The Proceedings of the Fluids engineering conference Vol. 2019 ( 0 ) page： OS3-07 2019
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Language：Japanese Publisher：The Japan Society of Mechanical Engineers
<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>
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WATABE Shotaro, Uchiyama Tomomi, TAKAMURE Kotaro, ZHANG Hedong, DEGAWA Tomohiro
The Proceedings of Mechanical Engineering Congress, Japan Vol. 2019 ( 0 ) page： S16105P 2019
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Language：Japanese Publisher：The Japan Society of Mechanical Engineers
<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>
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FLOW PAST TWO CYLINDERS ARRANGED IN TANDEM WITHIN A MICROBUBBLE PLUME
Uchiyama, T; Kano, R; Degawa, T; Takamure, K
PROCEEDINGS OF THE ASME/JSME/KSME JOINT FLUIDS ENGINEERING CONFERENCE, 2019, VOL 5 2019
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Uchiyama, T; Honda, S; Degawa, T
RENEWABLE ENERGY Vol. 126 page： 545 - 551 2018.10
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Multi-Directional Redistribution for the Vortex Particle Method
Degawa Tomohiro, Uchiyama Tomomi
The Proceedings of the 8th International Conference on Vortex Flow Mechanics 2018.10
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Improvements to the convection scheme in the vortex particle method using a semi-Lagrangian method Reviewed Open Access
Degawa Tomohiro, Uchiyama Tomomi
JOURNAL OF ALGORITHMS & COMPUTATIONAL TECHNOLOGY Vol. 12 ( 3 ) page： 223 - 233 2018.9
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Experimental study of mixing of density-stratified fluid in a cylindrical tank by a diagonal jet
Degawa Tomohiro, Uno Kota, Uchiyama Tomomi
Proceedings of 18th International Symposium on Flow Visualization 2018.6
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Falling of a Spherical Particle in Microbubble Plume and Microbubble Behavior around the Particle
UCHIYAMA Tomomi, KAWASAKI Yujiro, DEGAWA Tomohiro
The Proceedings of the Fluids engineering conference Vol. 2018 ( 0 ) page： OS5-20 2018
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Language：Japanese Publisher：The Japan Society of Mechanical Engineers
<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>
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Numerical Simulation of Flow around an Oscillating Cylinder by Vortex in Cell Method
DEGAWA Tomohiro, GU Qiang, UCHIYAMA Tomomi
The Proceedings of Mechanical Engineering Congress, Japan Vol. 2018 ( 0 ) page： S0510105 2018
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Language：Japanese Publisher：The Japan Society of Mechanical Engineers
<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>
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Motion of a Spherical Particle in Microbubble Plume and Bubble Behavior around the Particle
UCHIYAMA Tomomi, DEGAWA Tomohiro, KAWASAKI Yujiro
The Proceedings of Mechanical Engineering Congress, Japan Vol. 2018 ( 0 ) page： S0510401 2018
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Language：Japanese Publisher：The Japan Society of Mechanical Engineers
<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>
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Development of a micro-hydraulic turbine excellent in foreign matter passage performance
Kaneko Akira, Honda Satoshi, Uchiyama Tomomi, Degawa Tomohiro, Okayama Tomoko, Pasomsouk K
Proceedings of International Conference on Materials and Systems for Sustainability 2017 2017.9
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Generation and transport of solid particle clusters using a vortex ring launched into water Reviewed
Tomomi Uchiyama, Chiaki Yano, Tomohiro Degawa
International Journal of Chemical Engineering and Applications Vol. 8 ( 4 ) page： 253-260 2017.8
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Language：English Publishing type：Research paper (scientific journal)
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Behavior of a jet issuing diagonally upward into two-layer density-stratified fluid in a cylindrical tank Reviewed
Tomohiro Degawa, Shota Fukue, Tomomi Uchiyama, Akira Ishikawa, Koji Motoyama
Journal of Flow Control, Measurement & Visualization Vol. 5 ( 3 ) page： 51-64 2017.7
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Behavior of a jet issuing diagonally upward into two-layer density-stratified fluid in a cylindrical tank Reviewed
Degawa Tomohiro, Fukue Shota, Uchiyama Tomoni, Ishikawa Akira, Motoyama Koji
Journal of Flow Control, Measurement & Visualization Vol. 5 ( 3 ) page： 51 - 64 2017.6
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Behavior of a jet issuing diagonally upward into two-layer density-stratified fluid in a cylindrical tank
Degawa Tomohiro, Fukue Shota, Uchiyama Tomoni, Ishikawa Akira, Motoyama Koji
Proceedings of 13th International Symposium on Experimental and Computational Aerothermodynamics of Internal Flows 2017.5
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漸化式によるVortex-in-Cell法の渦要素―格子補間の高速化とその誤差評価 Reviewed
出川智啓
日本計算工学会論文集 2015.2
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Authorship：Lead author Language：Japanese Publishing type：Research paper (scientific journal)
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Numerical Simulation of Rotating Turbulent Channel Flow by the Vortex in Cell Method Reviewed
Uchiyama T., Hamada H., Degawa T.
The Open Transport Phenomena Journal Vol. 5 page： 30-41 2013
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Language：English Publishing type：Research paper (scientific journal)
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Vortex Simulation of Bubble Plume Around a Rectangular Cylinder Reviewed
Uchiyama T., Degawa T.
The International Journal of Transport Phenomena Vol. 11 ( 3 ) page： 219-232 2009
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Language：English Publishing type：Research paper (scientific journal)
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Numerical Simulation of Plane Bubble Plume by Vortex Method
Uchiyama T., Degawa T.
Journal of Mechanical Engineering Science, Institution of Mechanical Engineers Vol. 222 ( 7 ) page： 1193-1201 2008
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Language：English Publishing type：Research paper (scientific journal)
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Numerical Simulation of Bubbly Flow around Two Tandem Square-Section Cylinders by Vortex Method Reviewed
Degawa T., Uchiyama T.
Journal of Mechanical Engineering Science, Institution of Mechanical Engineers Vol. 222 ( 2 ) page： 225-234 2008
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Authorship：Lead author Language：English Publishing type：Research paper (scientific journal)
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渦法による平面気泡プルームの数値解析 Reviewed
出川智啓, 内山知実
日本機械学会論文集B編 Vol. 73 ( 727 ) page： 703-710 2007.3
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Authorship：Lead author Language：Japanese Publishing type：Research paper (scientific journal)
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角柱周りの気泡プルームの渦法解析 Reviewed
出川智啓, 内山知実
混相流研究の進展 Vol. 2 page： 149-156 2007.3
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Authorship：Lead author Language：Japanese Publishing type：Research paper (scientific journal)
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Vortex Simulation of the Bubbly Flow around a Hydrofoil Reviewed
Uchiyama T., Degawa T.
International Journal of Rotating Machinery 2007
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Numerical Simulation for Gas-Liquid Two-Phase Free Turbulent Flow Based on Vortex in Cell Method Reviewed
Uchiyama T., Degawa T.
JSME International Journal, Series B Vol. 49 ( 4 ) page： 1008-1015 2006.11
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Language：English Publishing type：Research paper (scientific journal)
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Vortex in Cell法による気液二相自由乱流の数値解析（数値解法と角柱周りの気泡流解析への適用） Reviewed
内山知実,出川智啓
日本機械学会論文集B編 Vol. 72 ( 718 ) page： 1418-1425 2006.6
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Language：Japanese Publishing type：Research paper (scientific journal)
Books
Books 1
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エンジニア・研究者のためのWordチュートリアルガイド
出川智啓（ Role： Sole author）
株式会社インプレスR&D 2017.12 （ ISBN:987-4-8443-9805-9 ）
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Total pages：108 Language：Japanese Book type：Scholarly book
Presentations
Presentations 96
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拡張性や再利用性を考慮した格子ボルツマン法のプログラム実装方法について
出川智啓, 内山知実, 高牟礼光太郎
第38回数値流体力学シンポジウム 2024.12.11 一般社団法人日本流体力学会
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Event date： 2024.12
Language：Japanese Presentation type：Oral presentation (general)
Venue：東京大学生産技術研究所
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差分法をいた流体の数値計算プログラム開発における離散化を補助するツールの作成
出川智啓
オープンCAEシンポジウム2024 2024.11.9 一般社団法人オープンCAE学会
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Event date： 2024.11
Language：Japanese Presentation type：Oral presentation (general)
Venue：九州大学 Country：Japan
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モダンFortranの並列処理とGPGPU Invited
出川智啓
第1回モダンなFortranワークショップ 2024.8.31 高性能Fortran推進協議会
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Event date： 2024.8
Language：Japanese Presentation type：Symposium, workshop panel (nominated)
Venue：京都大学学術情報メディアセンター Country：Japan
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Experimental study of mixing of density-stratified fluid in a cylindrical tank by a diagonal jet International conference
Tomohiro Degawa, Kota Uno, and Tomomi Uchiyama
International Symposium on Flow Visualisation 18
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Event date： 2018.6
Language：English Presentation type：Oral presentation (general)
Country：Switzerland
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渦粒子法における多方向再配置について
出川智啓, 内山知実
第31回数値流体力学シンポジウム
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Event date： 2017.12
Language：Japanese Presentation type：Oral presentation (general)
Country：Japan
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渦輪による密度成層流体の混合の渦法シミュレーション
伊藤丈矩, 出川智啓, 内山知実, 角田博之
第31回数値流体力学シンポジウム
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Event date： 2017.12
Language：Japanese Presentation type：Oral presentation (general)
Country：Japan
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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現象に関する実験的研究 International conference
出川智啓, 宇野浩太, 内山知実
可視化情報全国講演会
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Event date： 2017.11
Language：Japanese Presentation type：Oral presentation (general)
Country：Japan
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気泡プルームにより駆動される固体球の挙動に関する研究 International conference
川崎雄次郎, 出川智啓, 内山知実
可視化情報全国講演会
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Event date： 2017.11
Language：English Presentation type：Oral presentation (general)
Country：Japan
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Numerical simulation of mixing by a vortex ring launched vertically upward into two-layer density-stratified fluid International conference
Tomohiro Degawa, Takenori Ito, Tomomi Uchiyama
The Ninth JSME-KSME Thermal and Fluids Engineering Conference
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Event date： 2017.10
Language：English Presentation type：Oral presentation (general)
Country：Japan
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Numerical simulation of the interaction between a vortex ring and bubble plume by vortex in cell method International conference
Van Luc Nguyen, Tomohiro Degawa, Tomomi Uchiyama
The Ninth JSME-KSME Thermal and Fluids Engineering Conference
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Event date： 2017.10
Language：English Presentation type：Oral presentation (general)
Country：Japan
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Numerical simulation of mixing of two-layer density-stratified fluid by vortex rings launched toward the density interface International conference
Tomohiro Degawa, Tomomi Uchiyama
The 6th International Conference on Jets, Wakes and Separated Flows
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Event date： 2017.10
Language：English Presentation type：Oral presentation (general)
Country：United States
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Numerical simulation of a vortex ring impacting with a density interface of density-stratified fluids International conference
Takenori Ito, Tomohiro Degawa, Tomomi Uchiyama, Hiroyuki Tsunoda
The 6th International Conference on Jets, Wakes and Separated Flows
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Event date： 2017.10
Language：English Presentation type：Oral presentation (general)
Country：United States
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Development of a micro-hydraulic turbine excellent in foreign matter passage performance
Akira Kaneko, Satoshi Honda, Tomomi Uchiyama, Tomohiro Degawa, Tomoko Okayama, Korakanh Pasomsouk
International Conference on Materials and Systems for Sustainability
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Event date： 2017.9 - 2017.10
Language：English Presentation type：Poster presentation
Country：Japan
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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
日本機械学会2017年度年次大会
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Event date： 2017.9
Language：Japanese Presentation type：Oral presentation (general)
Country：Japan
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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
日本機械学会2017年度年次大会
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Event date： 2017.9
Language：Japanese Presentation type：Oral presentation (general)
Country：Japan
-
Flow around a circular cylinder inside a bubble plume International conference
More details
Event date： 2017.8
Language：English Presentation type：Oral presentation (general)
Country：Japan
-
密度成層流体中に射出された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
混相流シンポジウム2017
More details
Event date： 2017.8
Language：Japanese Presentation type：Oral presentation (general)
Country：Japan
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気泡プルーム中に置かれた直列２円柱周りの流れ
鹿野良太, 出川智啓, 内山知実
混相流シンポジウム2017
More details
Event date： 2017.8
Language：Japanese Presentation type：Oral presentation (general)
Country：Japan
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オブジェクト指向Fortranが拓く（はずだった）新しい世界 Invited
出川智啓
第3回並列Fortranに関するシンポジウム
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Event date： 2017.6
Language：Japanese Presentation type：Oral presentation (general)
Country：Japan
-
Numerical simulation of jet issuing diagonally upward into density-stratified fluid in cylindrical tank International conference
Tomohiro Degawa, Tomomi Uchiyama, Isao Aozasa, Akira Ishikawa, Koji Motoyama
The 14th Asian Symposium on Visualization
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Event date： 2017.5
Language：English Presentation type：Oral presentation (general)
Country：China
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Behavior of a jet issuing diagonally upward into two-layer density-stratified fluid in a cylindrical tank International conference
Tomohiro Degawa, Shota Fukue, Tomomi Uchiyama, Akira Ishikawa, Koji Motoyama
13th International Symposium on Experimental and Computational Aerothermodynamics of Internal Flows
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Event date： 2017.5
Language：English Presentation type：Oral presentation (general)
Venue：Okinawa Institute of Science and Technology Graduate University Country：Japan
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セミラグランジュ的渦粒子法について
出川智啓, 内山知実
第30回数値流体力学シンポジウム
More details
Event date： 2016.12
Language：Japanese Presentation type：Oral presentation (general)
Country：Japan
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CUDA Fortranにおける並列リダクションの実装について
出川智啓
日本機械学会第29回計算力学講演会
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Event date： 2016.9
Language：Japanese Presentation type：Oral presentation (general)
Country：Japan
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技術系大学におけるGPU教育の一試行
出川智啓
オープンCAEシンポジウム2015
More details
Event date： 2015.11
Language：Japanese Presentation type：Oral presentation (general)
Country：Japan
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CUDA Fortranの利便性を高めるFortran言語の機能 Invited
出川智啓
Prometech Simulation Conference 2015
More details
Event date： 2015.9
Language：Japanese Presentation type：Oral presentation (invited, special)
Country：Japan
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オブジェクト指向プログラミングに基づく差分法のCUDA Fortran実装と評価
出川智啓,中道義之
第20回計算工学講演会
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Event date： 2015.6
Language：Japanese Presentation type：Oral presentation (general)
Country：Japan
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長岡技術科学大学におけるGPGPU教育の一試行
出川智啓
第21回計算工学講演会
More details
Event date： 2015.5 - 2016.6
Language：Japanese Presentation type：Oral presentation (general)
Country：Japan
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Fortranを用いたオブジェクト指向プログラミングに基づくGPU実装に関する一検討
出川智啓,中道義之
第28回数値流体力学シンポジウム
More details
Event date： 2014.12
Language：Japanese Presentation type：Oral presentation (general)
Country：Japan
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Fortranを用いたオブジェクト指向プログラミングに基づく渦法の実装に関する一検討 International conference
出川智啓,中道義之
第28回数値流体力学シンポジウム
More details
Event date： 2014.12
Language：English Presentation type：Oral presentation (general)
Country：Japan
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オブジェクト指向プログラミングに基づいた流体解析プログラムのCUDA Fortran実装の試み
出川智啓,中道義之
オープンCAEシンポジウム2014
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Event date： 2014.11
Language：Japanese Presentation type：Oral presentation (general)
Country：Japan
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Numerical Simulation of the Behavior for a Vortex Ring Convecting along the Axis of a Rotating Field International conference
Degawa T., Nakano M., Uchiyama T.
6th International Conference on Vortex Flows and Vortex Models
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Event date： 2014.11
Language：English Presentation type：Poster presentation
Country：Japan
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Numerical Simulation of Flow around Sports Cycles Using Open Source CFD Software International conference
Degawa T., Ito T.
6th International Conference on Vortex Flows and Vortex Models
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Event date： 2014.11
Language：English Presentation type：Poster presentation
Country：Japan
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A Computation Procedure of Initial Field of Vortical Flow and Implementation on a GPU International conference
Degawa T.
6th International Conference on Vortex Flows and Vortex Models
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Event date： 2014.11
Language：English Presentation type：Poster presentation
Country：Japan
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オブジェクト指向プログラミングに基づいた渦法のFortran実装
出川智啓,中道義之
日本機械学会第92期流体工学部門講演会
More details
Event date： 2014.10
Language：Japanese Presentation type：Oral presentation (general)
Country：Japan
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PGI CUDA FortranとGPU最適化ライブラリの一連携法 Invited International conference
出川智啓
Prometech Simulation Conference 2014
More details
Event date： 2014.9
Language：Japanese Presentation type：Public lecture, seminar, tutorial, course, or other speech
Country：Japan
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渦度方程式に対する時間・空間運動エネルギ保存差分法によって作られる非線形連立方程式の解法について
出川智啓
日本機械学会2014年度年次大会
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Event date： 2014.9
Language：Japanese Presentation type：Oral presentation (general)
Country：Japan
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集団を形成するスポーツサイクル周りに生じる渦流れ : Kinectによる簡易3Dスキヤンシステム構築とOpen Foamによる数値計算
伊藤丈矩, 出川智啓
日本機械学会2014年度年次大会
More details
Event date： 2014.9
Language：Japanese Presentation type：Oral presentation (general)
Country：Japan
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渦度方程式に対する時間・空間運動エネルギ保存差分法の構築 International conference
出川 智啓
日本応用数理学会2014年度年会
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Event date： 2014.9
Language：Japanese Presentation type：Oral presentation (general)
Country：Japan
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陰的離散化されたBurgers方程式に対するJacobian-Free Newton-Krylov法のKrylov反復に用いる解法の選択について
出川智啓
2014年並列／分散／協調処理に関する『新潟』サマー・ワークショップ
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Event date： 2014.7
Language：Japanese Presentation type：Oral presentation (general)
Country：Japan
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渦法への4次精度Hermite積分法の適用
伊藤丈矩,出川智啓
第27回数値流体力学シンポジウム
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Event date： 2013.12
Language：Japanese Presentation type：Oral presentation (general)
Country：Japan
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コンパクト差分近似されたPoisson方程式に対する非方向分離解法のGPU実装
出川智啓
第27回数値流体力学シンポジウム
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Event date： 2013.12
Language：Japanese Presentation type：Oral presentation (general)
Country：Japan
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渦度方程式に対する時間・空間運動エネルギ保存差分法の実装と評価
出川智啓
日本機械学会第91期流体工学部門講演会
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Event date： 2013.11
Language：Japanese Presentation type：Oral presentation (general)
Country：Japan
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渦法における時間積分法の改良 International conference
伊藤丈矩,出川智啓
日本機械学会第91期流体工学部門講演会
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Event date： 2013.11
Language：English Presentation type：Oral presentation (general)
Country：Japan
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渦度方程式に対する差分法のオブジェクト指向プログラミングによるCPU実装とGPU移植
出川智啓,中道義之
日本機械学会2015年度年次大会
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Event date： 2013.9 - 2015.9
Language：Japanese Presentation type：Oral presentation (general)
Country：Japan
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渦度方程式に対する時間・空間運動エネルギ保存差分法構築の試み
出川智啓
日本機械学会 2013年度年次大会
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Event date： 2013.9
Language：Japanese Presentation type：Oral presentation (general)
Country：Japan
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渦運動による音波発生の数値シミュレーションのGPU実装
出川智啓
GTC Japan 2013
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Event date： 2013.8
Language：Japanese Presentation type：Poster presentation
Country：Japan
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可変密度流体計算における初期圧力の一計算法とそのGPU実装
出川智啓
第18回計算工学講演会
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Event date： 2013.6
Language：Japanese Presentation type：Oral presentation (general)
Country：Japan
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漸化式によるVortex in Cell法の粒子－格子間相互作用の高速化とその誤差評価
坂代一弥,出川智啓
第26回数値流体力学シンポジウム
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Event date： 2012.12
Language：Japanese Presentation type：Oral presentation (general)
Country：Japan
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渦度方程式の差分計算における境界条件と運動エネルギの保存性について International conference
出川智啓
日本機械学会 第90期流体工学部門講演会
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Event date： 2012.11
Language：Japanese Presentation type：Oral presentation (general)
Country：Japan
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Vortex-in-Cell 法の粒子－格子間相互作用に対する逐次更新計算法
坂代一弥,出川智啓
日本機械学会 第90期流体工学部門講演会
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Event date： 2012.11
Language：Japanese Presentation type：Oral presentation (general)
Country：Japan
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並列化LU分解を用いたコンパクト差分のGPU実装と性能評価
出川智啓
日本機械学会 第25回計算力学講演会
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Event date： 2012.10
Language：Japanese Presentation type：Oral presentation (general)
Country：Japan
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渦度方程式の差分計算における運動エネルギの保存性に関する一考察
出川智啓
日本機械学会 2012年度年次大会
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Event date： 2012.9
Language：English Presentation type：Oral presentation (general)
Country：Japan
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渦法の粒子－格子間相互作用におけるexp(x)の高速計算法の提案と性能評価 International conference
坂代一弥,出川智啓
2012年並列／分散／協調処理に関する『鳥取』サマー・ワークショップ
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Event date： 2012.8
Language：Japanese Presentation type：Oral presentation (general)
Country：Japan
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GPUによるコンパクト差分の並列計算
出川智啓
GTC Japan 2012
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Event date： 2012.7
Language：Japanese Presentation type：Poster presentation
Country：Japan
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コンパクト差分に対する直接解法の並列化とGPUへの実装
出川智啓
第17回計算工学講演会
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Event date： 2012.5
Language：Japanese Presentation type：Oral presentation (general)
Country：Japan
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PGI CUDA FortranによるCPUコード移植の高速化 ～圧縮性流体計算の高速化/GPUに適したスキームの検討～ Invited International conference
出川智啓
第３回GPUセミナー ツールで始めるＧＰＧＰＵ
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Event date： 2012.5
Language：Japanese Presentation type：Public lecture, seminar, tutorial, course, or other speech
Country：Japan
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Vortex in Cell法のための圧力計算法
出川智啓
第25回数値流体力学シンポジウム
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Event date： 2011.12
Language：Japanese Presentation type：Oral presentation (general)
Country：Japan
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Interaction of Bubbles with a Vortex Ring Launched into Bubble Plume International conference
Uchiyama T., Kusamichi S., Degawa, T.
11th International Conference on Fluid Control, Measurements, and Visualization
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Event date： 2011.12
Language：English Presentation type：Oral presentation (general)
Country：Taiwan, Province of China
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気泡プルームの内部に射出された渦輪の挙動
草道聡,内山知実,出川智啓
2011年 可視化情報学会全国講演会
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Event date： 2011.9
Language：Japanese Presentation type：Oral presentation (general)
Country：Japan
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GPUへのコンパクト差分の実装と圧縮性流体計算への適用
出川智啓
NVIDIA GTC Workshop Japan 2011
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Event date： 2011.7
Language：Japanese Presentation type：Poster presentation
Country：Japan
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GPUを用いた圧縮性流体の2次元数値計算におけるコンパクト差分の実装と評価
出川智啓
16回計算工学講演会
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Event date： 2011.5
Language：Japanese Presentation type：Oral presentation (general)
Country：Japan
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双極渦と壁面の衝突角度の変化による渦運動と音響場の関係 International conference
出川智啓,弘中一也,前川博,高見創
第24回数値流体力学シンポジウム
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Event date： 2010.12
Language：Japanese Presentation type：Oral presentation (general)
Country：Japan
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GPUへのコンパクト差分の実装と圧縮性流体計算への適用 Invited
出川智啓
GPUシンポジウム2010
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Event date： 2010.10
Language：English Presentation type：Oral presentation (invited, special)
Country：Japan
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CUDA Fortranを用いた圧縮性・非圧縮性流体の差分法計算 Invited
出川智啓
オープンCAE学会主催 第1回並列計算セミナー
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Event date： 2010.10
Language：Japanese Presentation type：Oral presentation (invited, special)
Country：Japan
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混合型移流項を用いた圧縮性粘性流れの数値計算に対する特性境界条件
出川智啓,前川博
日本機械学会2010年度年次大会
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Event date： 2010.9
Language：Japanese Presentation type：Oral presentation (general)
Country：Japan
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オイラー・ラグランジュモデルを用いた気泡流の数値計算におけるGPGPUの適用性
出川智啓
日本混相流学会年会講演会
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Event date： 2010.7
Language：Japanese Presentation type：Oral presentation (general)
Country：Japan
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渦度方程式とCIP法に基づく平面気泡プルームの数値解析
竹内優弘,出川智啓,前川博
日本混相流学会年会講演会
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Event date： 2010.7
Language：Japanese Presentation type：Oral presentation (general)
Country：Japan
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超音速境界層の乱流遷移に及ぼす上流撹乱の影響
松原洋輔,前川博,高見創,出川智啓
日本機械学会 関東支部 第16期総会講演会
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Event date： 2010.3
Language：Japanese Presentation type：Oral presentation (general)
Country：Japan
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渦度方程式の離散化形式が気泡流解析におよぼす影響について
出川智啓,前川博
第13回オーガナイズド混相流フォーラム
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Event date： 2009.11
Language：Japanese Presentation type：Oral presentation (general)
Country：Japan
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壁近傍の渦と誘起された二次渦により発生する音響場に関する研究
弘中一也,前川博,高見創,出川智啓
日本機械学会山梨講演会講2009
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Event date： 2009.10
Language：Japanese Presentation type：Oral presentation (general)
Country：Japan
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気泡流の数値解析における渦度方程式の離散化形式について
出川智啓,前川博
日本混相流学会年会講演会
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Event date： 2009.8
Language：Japanese Presentation type：Oral presentation (general)
Country：Japan
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三次元渦法による平面気泡プルームの数値解析
内山知実,松村彰士,出川智啓
本混相流学会年会講演会
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Event date： 2008.8
Language：Japanese Presentation type：Oral presentation (general)
Country：Japan
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渦法による角柱まわりの気泡流の数値解析 International conference
出川智啓,内山知実
日本混相流学会年会講演会
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Event date： 2008.8
Language：Japanese Presentation type：Oral presentation (general)
Country：Japan
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渦法による翼周りの気泡流の数値シミュレーション
出川智啓,内山知実
第85期日本機械学会流体工学部門講演会
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Event date： 2007.11
Language：Japanese Presentation type：Oral presentation (general)
Country：Japan
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Vortex Simulation of the Bubbly Flow around a Hydrofoil International conference
Degawa T., Uchiyama T.
9th Asian International Conference on Fluid Machinery
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Event date： 2007.10
Language：English Presentation type：Oral presentation (general)
Country：Korea, Republic of
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Numerical Prediction for the Bubbly Flow around a Hydrofoil by Vortex Method International conference
Uchiyama T., Degawa T.
5th Joint ASME/JSME Fluids Engineering Conference
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Event date： 2007.8
Language：English Presentation type：Oral presentation (general)
Country：United States
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Numerical Simulation of Bubbly Flow around a Pair of Tandem Cylinders by Vortex Method International conference
Degawa T., Uchiyama T.
6th International Conference on Multiphase Flow
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Event date： 2007.7
Language：English Presentation type：Oral presentation (general)
Country：Germany
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翼まわりの気泡流の渦法シミュレーション International conference
出川智啓,内山知実
日本混相流学会年会講演会
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Event date： 2007.6
Language：Japanese Presentation type：Oral presentation (general)
Country：Japan
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渦法による平面気泡プルームの数値解析 International conference
出川智啓,内山知実
日本機械学会第19回計算力学部門講演会
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Event date： 2006.11
Language：Japanese Presentation type：Oral presentation (general)
Country：Japan
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Vortex Method for Free-Surface Flow Generated by Submerged Circular Cylinder International conference
Uchiyama T., Degawa T.
23rd IAHR Symposium on Hydraulic Machinery and Systems
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Event date： 2006.10
Language：English Presentation type：Oral presentation (general)
Country：Japan
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Vortex Simulation of the Bubble Plume around a Rectangular Cylinder International conference
Degawa T., Uchiyama T., Takamatsu Y.
17th International Symposium on Transport Phenomena
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Event date： 2006.9
Language：English Presentation type：Oral presentation (general)
Country：Japan
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Vortex Simulation of the Bubbly Flow around a Square-Section Cylinder International conference
11th Asian Congress of Fluid Mechanics
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Event date： 2006.5
Language：English Presentation type：Oral presentation (general)
Country：Malaysia
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Numerical Simulation of Plane Bubble Plume by Vortex in Cell Method
Degawa T., Uchiyama T., Takamatsu Y.
International Symposium on Frontiers of Computational Science 2005
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Event date： 2005.12
Language：English Presentation type：Poster presentation
Country：Japan
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Numerical Simulation of Bubble-Driven Plume by Vortex Method International conference
Uchiyama T., Degawa T., Takamatsu Y.
Third International Conference on Vortex Flows and Vortex Models
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Event date： 2005.11
Language：English Presentation type：Poster presentation
Country：Japan
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Vortex in Cell法による平面気泡プルームの数値解析 International conference
出川智啓,高松祐介,内山知実
計算科学シンポジウム
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Event date： 2005.10
Language：Japanese Presentation type：Oral presentation (general)
Country：Japan
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Numerical Simulation of the Bubbly Flow around a Rectangular Cylinder by Vortex in Cell Method International conference
Degawa T., Uchiyama T.
International Conference on Jets, Wakes and Separated Flows
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Event date： 2005.10
Language：English Presentation type：Oral presentation (general)
Country：Japan
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Vortex in Cell法を用いた気液二相自由乱流の数値解析 International conference
出川智啓,内山知実
日本機械学会東海支部第54期総会講演会
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Event date： 2005.3
Language：Japanese Presentation type：Oral presentation (general)
Country：Japan
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Vortex Simulation for Bubble-Laden Free Turbulent Flow International conference
Uchiyama T., Degawa T., Takamatsu Y.
Japan-U.S. Seminar on Two-Phase Flow Dynamics
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Event date： 2004.12
Language：English Presentation type：Poster presentation
Country：Japan
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Numerical Simulation for Bubble-Laden Plane Mixing Layer by Vortex in Cell Method International conference
Uchiyama T., Degawa T.
Third International Symposium on Two-Phase Flow Modelling and Experimentation
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Event date： 2004.9
Language：English Presentation type：Oral presentation (general)
Country：Italy
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Vortex in Cell法による気泡を含む平面混合層の数値解析
出川智啓,内山知実
日本混相流学会年会講演会
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Event date： 2004.8
Language：English Presentation type：Oral presentation (general)
Country：Japan
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Numerical Simulation for Bubble-Laden Free Turbulent Flow by Vortex in Cell Method International conference
Uchiyama T., Degawa T.
Fifth International Conference on Multiphase Flow
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Event date： 2004.6
Language：English Presentation type：Oral presentation (general)
Country：Japan
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Interactions Between Vortex Ring and Density Interface of Two Stratified Fluids International conference
Degawa Tomohiro, Matsuda Yu, Uchiyama Tomomi
The 3rd International Symposium on Creation of Life Innovation Materials for Interdisciplinary and International Researcher Development 2018.9.25
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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
日本機械学会年次大会 2018.9.12
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Numerical Simulation of Flow around an Oscillating Cylinder by Vortex in Cell Method
Degawa Tomohiro, Gu Qiang
2018.9.11
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GPGPU Practical Education at a University
Degawa Tomohiro
GTC Japan 2018.9.13
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Numerical Simulation of Cryogenic Gas-Liquid Two-Phase Flow in a Coil Winding of a Superconducting Magnet International conference
DEGAWA TomohiroDegawa Tomohiro, Obana Tetsuhiro, Uchiyama Tomomi
The 27th International Toki Conference on Plasma and Fusion Research & The 13th Asia Pacific Plasma Theory Conference 2018.11.20
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KAKENHI (Grants-in-Aid for Scientific Research)
KAKENHI (Grants-in-Aid for Scientific Research) 1
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Study on the generation and transport of bubble cluster by a vortex ring
Grant number：18K03924 2018.4 - 2021.3
Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C)
Uchiyama Tomomi
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Authorship：Coinvestigator(s)
A study searching for the generation and transport of a bubble cluster by a vortex ring is carried out. A vortex ring is launched vertically upward into a water tank by discharging the water from a cylinder mounted at the bottom of the tank with a piston. Air bubbles are injected into the vortex ring from a needle attached to the cylinder outlet. The cylinder inner diameter and the piston stroke are 42.5 mm and 100 mm, respectively. The mean diameter of the bubbles is 3.4 mm. When the strength of the vortex ring is large than a critical value, the bubbles are entrained in the vortex core and form a cluster. The entrained bubbles are successfully transported by the convection of the vortex ring. The convection velocity of the vortex ring is scarcely affected by the entrained bubbles, but the radius is enlarged slightly.
Industrial property rights
Industrial property rights 1
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(1) 気泡流の解析方法，気泡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並びに気泡流シミュレーション装置
内山知実, 出川智啓
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Application no：特願2004-272011 Date applied：2004.9
Announcement no：特開2006-085603 Date announced：2006.3
Patent/Registration no：第4032123号 Date registered：2007.11
Country of applicant：Domestic
Teaching Experience (Off-campus)
Teaching Experience (Off-campus) 17
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知能機械工学実験
（The University of Electro-Communications）
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電子機械設計製作
（Numazu College of Technology）
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電子機械設計演習
（Numazu College of Technology）
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電子制御工学実験V
（Numazu College of Technology）
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電子制御工学実験IV
（Numazu College of Technology）
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知能機械基礎実験
（The University of Electro-Communications）
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流体力学および演習
（The University of Electro-Communications）
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工業英語
（Numazu College of Technology）
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工業熱力学
（Numazu College of Technology）
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基礎化学実験A
（The University of Electro-Communications）
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先端GPGPUシミュレーション工学特論
（Nagaoka University of Technology）
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プログラミング入門
（Numazu College of Technology）
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コンピュータリテラシー
（The University of Electro-Communications）
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オブジェクト指向プログラム設計
（Numazu College of Technology）
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GPGPU実践基礎工学
（Nagaoka University of Technology）
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GPGPU実践プログラミング
（Nagaoka University of Technology）
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C言語基礎演習
（Numazu College of Technology）
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株式会社日本テクノセンター 2015.1
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