Updated on 2024/05/21

写真a

 
TSUJI, Yoshiyuki
 
Organization
Graduate School of Engineering Energy Engineering 3 Professor
Graduate School
Graduate School of Engineering
Undergraduate School
School of Engineering Energy Science and Engineering
Title
Professor
Contact information
メールアドレス

Degree 1

  1. 工学博士

Research Interests 3

  1. Quantum turbulence

  2. Fluid Engineering

  3. Energy Engineering Science

Research Areas 2

  1. Others / Others  / Fluid Mechanics

  2. Others / Others  / Heat Engineering

Current Research Project and SDGs 3

  1. Universal scaling in High Reynolds number Turbulence

  2. Quantum turbulence

  3. 省エネルギーと流動抵抗軽減に向けた乱流構造の制御

Research History 2

  1. 名古屋大学工学研究科助教授

    1999.7

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    Country:Japan

  2. 名古屋大学工学研究科助手

    1993.4 - 1999.6

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    Country:Japan

Education 1

  1. Nagoya University   Graduate School, Division of Engineering   Mechanical Engineering

    - 1993

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    Country: Japan

Professional Memberships 4

  1. 日本機械学会

  2. 日本流体力学会

  3. 日本物理学会

  4. 日本原子力学会

Awards 4

  1. 日本機械学会論文賞

    2021.4   日本機械学会  

  2. 日本機械学会論文賞

    2017.4   日本機械学会   高レイノルズ数円管流における平均速度分布型に関する実験的研究

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    Award type:Honored in official journal of a scientific society, scientific journal  Country:Japan

  3. 日本流体力学会 竜門賞

    2003.8  

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    Country:Japan

  4. 日本機械学会賞研究奨励賞

    1993  

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    Country:Japan

 

Papers 106

  1. Reynolds number dependence of turbulent kinetic energy and energy balance of 3-component turbulence intensity in a pipe flow Invited Reviewed

    M. Ono, N. Furuichi, Y. Tsuji

    Journal of Fluid Mechanics   Vol. 975   page: A9   2023.11

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    Authorship:Last author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: https://doi.org/10.1017/jfm.2023.842

  2. Taylor's frozen hypothesis of the pressure fluctuations in turbulent channel flow at high Reynolds numbers Reviewed

    A. Mehrez, Y. Yamamoto, Y. Tsuji

    Journal of Fluid Mechanics   Vol. 692   2023.9

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    Authorship:Last author   Language:English  

    DOI: https://doi.org/10.1017/jfm.2023.692

  3. Energy dissipation rate in the inertial sublayer of turbulent channel flow at large but finite Invited Reviewed

    Y. Yamamoto, Y. Kaneda, Y. Tsuji

    Physical Review Fluids   Vol. 8   2023.3

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: https://doi.org/10.1103/PhysRevFluids.8.034606

  4. Observation of water droplet motion in a shear flow

    Zhang Jiawen, Sato Takaya, Ooyama Takeshi, Koumura Keiji, Ito Takahiro, Tsuji Yoshiyuki

    EXPERIMENTAL THERMAL AND FLUID SCIENCE   Vol. 141   2023.2

  5. Energy Transfer of the Gross-Pitaevskii Turbulence in Weak-Wave-Turbulence and Strong-Turbulence Ranges

    Yoshida Kyo, Miura Hideaki, Tsuji Yoshiyuki

    JOURNAL OF LOW TEMPERATURE PHYSICS   Vol. 210 ( 1-2 ) page: 103 - 112   2023.1

  6. Meandering motions and their relation to the energy spectrum in turbulent shear flows

    Wang Yu, Tsuji Yoshiyuki

    INTERNATIONAL JOURNAL OF HEAT AND FLUID FLOW   Vol. 98   2022.12

  7. Statistics of the Lagrangian Trajectories' Curvature in Thermal Counterflow

    Sakaki Naoto, Maruyama Takumi, Tsuji Yoshiyuki

    JOURNAL OF LOW TEMPERATURE PHYSICS   Vol. 208 ( 5-6 ) page: 418 - 425   2022.9

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  8. Statistical Properties of Lagrangian Trajectories of Small Particles in Superfluid He-4

    Chen Lizhu, Maruyama Takumi, Tsuji Yoshiyuki

    JOURNAL OF LOW TEMPERATURE PHYSICS   Vol. 208 ( 5-6 ) page: 402 - 409   2022.9

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  9. Study on the Curvature of Lagrangian Trajectories in Thermal Counterflow

    Sakaki Naoto, Maruyama Takumi, Tsuji Yoshiyuki

    JOURNAL OF LOW TEMPERATURE PHYSICS   Vol. 208 ( 3-4 ) page: 223 - 238   2022.8

  10. Reynolds number dependence of inner peak turbulence intensity in pipe flow

    Ono Marie, Furuichi Noriyuki, Wada Yuki, Kurihara Noboru, Tsuji Yoshiyuki

    PHYSICS OF FLUIDS   Vol. 34 ( 4 )   2022.4

  11. Correction method of measurement volume effects on time-averaged statistics for laser Doppler velocimetry

    Wada Yuki, Furuichi Noriyuki, Tsuji Yoshiyuki

    EUROPEAN JOURNAL OF MECHANICS B-FLUIDS   Vol. 91   page: 233 - 243   2022

  12. Correction method of measurement volume effects on time-averaged statistics for laser Doppler velocimetry Invited Reviewed

    Yuki Wadaa, Noriyuki Furuichi, Yoshiyuki Tsuji

    European Journal of Mechanics-B/Fluid     2021.10

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    Authorship:Last author   Language:English  

    DOI: https://doi.org/10.1016/j.euromechflu.2021.10.007

  13. Large-scale energetic coherent structures and their effects on wall mass transfer rate behind orifice in round pipe

    Shan F., Qin S. Y., Xiao Y., Watanabe A., Kano M., Zhou F. Y., Liu Z. C., Liu W., Tsuji Y.

    JOURNAL OF FLUID MECHANICS   Vol. 927   2021.9

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    Language:Japanese  

    DOI: 10.1017/jfm.2021.761

    Web of Science

  14. Flow field structure formed around voice prosthesis during shunt vocalization Reviewed

    Seiya KOSAKO , Mariko HIRAMATSU , Yasushi FUJIMOTO and Yoshiyuki TSUJI

    Transactions of the JSME (in Japanese   Vol. 87 ( 901 )   2021.8

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    Authorship:Last author   Language:Japanese   Publishing type:Research paper (scientific journal)  

    DOI: https://doi.org/10.1299/transjsme.21-00157

  15. Identification of vortex structures in flow fields using tomographic PIV method

    Bhatt Kovid, Tsuji Yoshiyuki

    JOURNAL OF FLUID SCIENCE AND TECHNOLOGY   Vol. 16 ( 3 )   2021.8

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  16. Advanced multi-step brazing for fabrication of a divertor heat removal component

    Tokitani M., Hamaji Y., Hiraoka Y., Masuzaki S., Tamura H., Noto H., Tanaka T., Tsuneyoshi T., Tsuji Y., Muroga T., Sagara A.

    NUCLEAR FUSION   Vol. 61 ( 4 )   2021.4

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    Language:Japanese  

    DOI: 10.1088/1741-4326/abdfdb

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  17. High heat removal technique for a lithium neutron generation target used for an accelerator-driven BNCT system

    Yoshihashi S., Tsuneyoshi T., Tsuchida K., Furuzawa D., Honda S., Watanabe K., Yamazaki A., Tsuji Y., Hamaji Y., Tokitani M., Tamura H., Sagara A., Kiyanagi Y., Uritani A.

    JOURNAL OF INSTRUMENTATION   Vol. 16 ( 4 )   2021.4

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  18. Advanced Multi-Step Brazing (AMSB) for Fabrication of the Divertor Heat Removal Component Reviewed

    Tokitani Masayuki, Hamaji Yukinori, Hiraoka Yutaka, Masuzaki Suguru, Tamura Hitoshi, Noto Hiroyuki, Tanaka Teruya, Tsuneyoshi Tatsuya, Tsuji Yoshiyuki, Muroga Takeo, Sagara Akio

    Nucl. Fusion   Vol. 61   page: 046016   2021.3

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: doi.org/10.1088/1741-4326/abdfdb

  19. 声帯を模したモデル下流に形成される流動場構造が発生音に与える影響 Reviewed

    小迫 誠弥,恒吉 達矢,辻 義之

    日本機械学会論文集   Vol. 87 ( 893 )   2021.1

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    Language:Japanese   Publishing type:Research paper (scientific journal)  

    DOI: 10.1299/transjsme.20-00255

  20. Effect of large-scale structures on wall shear stress fluctuations in pipe flow Reviewed

    Tong Tong, Kovid Bhatt, Tatsuya Tsuneyoshi, and Yoshiyuki Tsuji

    Physical Review Fluids   Vol. 5   page: 104601   2020.10

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    Authorship:Corresponding author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1103/PhysRevFluids.5.104601

  21. An experimental setup for creating and imaging 4He2* excimer cluster tracers in superfluid helium-4 via neutron-3He absorption reaction Reviewed

    Rev. Sci. Instrum.   Vol. 91   page: 33318   2020.4

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: doi.org/10.1063/1.5130919

  22. Model Description on the Interface Deformation after the Release of the Pinned Contact Line Reviewed

    Japanese J. Multiphase Flow   Vol. 34 ( 1 ) page: 231 - 242   2020.4

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  23. An experimental setup for creating and imaging He-4(2)* excimer cluster tracers in superfluid helium-4 via neutron-He-3 absorption reaction

    Sonnenschein V, Tsuji Y., Kokuryu S., Kubo W., Suzuki S., Tomita H., Kiyanagi Y., Iguchi T., Matsushita T., Wada N., Kitaguchi M., Shimizu H. M., Hirota K., Shinohara T., Hiroi K., Hayashida H., Guo W., Ito D., Saito Y.

    REVIEW OF SCIENTIFIC INSTRUMENTS   Vol. 91 ( 3 )   2020.3

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    Language:Japanese  

    DOI: 10.1063/1.5130919

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  24. Generation of He-4(2)* Clusters via Neutron-He-3 Absorption Reaction Toward Visualization of Full Velocity Field in Quantum Turbulence

    Matsushita T., Sonnenschein V., Guo W., Hayashida H., Hiroi K., Hirota K., Iguchi T., Ito D., Kitaguchi M., Kiyanagi Y., Kokuryu S., Kubo W., Saito Y., Shimizu H. M., Shinohara T., Suzuki S., Tomita H., Tsuji Y., Wada N.

    JOURNAL OF LOW TEMPERATURE PHYSICS   Vol. 196 ( 1-2 ) page: 275 - 282   2019.7

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  25. Statistical Properties of Small Particle Trajectories in a Fully Developed Turbulent State in He-II

    Kubo Wataru, Tsuji Yoshiyuki

    JOURNAL OF LOW TEMPERATURE PHYSICS   Vol. 196 ( 1-2 ) page: 170 - 176   2019.7

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  26. Spectrum in the Strong Turbulence Region of Gross-Pitaevskii Turbulence

    Yoshida Kyo, Miura Hideaki, Tsuji Yoshiyuki

    JOURNAL OF LOW TEMPERATURE PHYSICS   Vol. 196 ( 1-2 ) page: 211 - 217   2019.7

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  27. Periodic Oscillation of Liquid Helium Boiling in a Narrow Rectangular Duct

    Eikoku Y., Ishida K., Iwamoto A., Tsuji Y.

    JOURNAL OF LOW TEMPERATURE PHYSICS   Vol. 196 ( 1-2 ) page: 6 - 12   2019.7

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  28. Linear Response Theory for One-Point Statistics in the Inertial Sublayer of Wall-Bounded Turbulence

    Kaneda Yukio, Yamamoto Yoshinobu, Tsuji Yoshiyuki

    PHYSICAL REVIEW LETTERS   Vol. 122 ( 19 )   2019.5

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  29. Linear Response Theory for One-Point Statistics in the Inertial Sublayer of Wall-Bounded Turbulence

    Yukio Kaneda, Yoshinobu Yamamoto, and Yoshiyuki Tsuji

      Vol. 122   2019.5

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    DOI: doi.org/10.1103/PhysRevLett.122.194502

  30. Pressure and spanwise velocity fluctuations in turbulent channel flows: Logarithmic behavior of moments and coherent structures

    Mehrez Ali, Philip Jimmy, Yamamoto Yoshinobu, Tsuji Yoshiyuki

    PHYSICAL REVIEW FLUIDS   Vol. 4 ( 4 )   2019.4

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  31. Reynolds number dependence of turbulent structures associated with high-amplitude wall pressure peaks in channel flow

    Mehrez Ali, Yamamoto Yoshinobu, Tsuji Yoshiyuki

    FLUID DYNAMICS RESEARCH   Vol. 51 ( 1 )   2019.2

  32. RIMS Research Project: Fluid Dynamics of Near-Wall Turbulence Preface

    Fukumoto Y., Kawahara G., Shimizu M., Tsuji Y., Waleffe F., Yamada M.

    FLUID DYNAMICS RESEARCH   Vol. 51 ( 1 )   2019.2

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    Language:Japanese  

    DOI: 10.1088/1873-7005/aaf522

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  33. Shear stress fluctuation measurements using an electrochemical method in pipe flow Reviewed

    Tong TONG, Tatsuya TSUNEYOSHI and Yoshiyuki TSUJI

    Journal of Fluid Science and Technology   Vol. 14 ( 2 )   2019

  34. Shear stress fluctuation measurements using an electrochemical method in pipe flow

    Tong Tong, Tsuneyoshi Tatsuya, Tsuji Yoshiyuki

    JOURNAL OF FLUID SCIENCE AND TECHNOLOGY   Vol. 14 ( 2 )   2019

  35. せん断流中の壁面上水滴挙動の動的接触角のモデル化

    佐藤 隆哉, 甲村 圭司, 大山 武士, 張 佳文, 伊藤 高啓, 辻 義之

    自動車技術会論文集   Vol. 50 ( 3 ) page: 926 - 931   2019

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    DOI: doi.org/10.11351/jsaeronbun.50.926

  36. Pressure and spanwise velocity fluctuations in turbulent channel flows: Logarithmic behavior of moments and coherent structures Reviewed

    Ali Mehrez, Jimmy Philip, Yoshinobu Yamamoto, and Yoshiyuki Tsuji

    Physical Rev. Fluisd   Vol. 4   page: 044601   2019

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    Publishing type:Research paper (scientific journal)  

    DOI: doi.org/10.1103/PhysRevFluids.4.044601

  37. Reynolds number dependence of turbulent structures associated with high-amplitude wall pressure peaks in channel flow Reviewed

    Ali Mehrez, Yoshinobu Yamamoto and Yoshiyuki Tsuji

    Fluid Dyn. Res.   Vol. 51   page: 011407   2019

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    Publishing type:Research paper (scientific journal)  

    DOI: doi.org/10.1088/1873-7005/aabfa9

  38. Statistical Properties of Small Particle Trajectories in a Fully Developed Turbulent State in He-II Reviewed

    Wataru Kubo and Yoshiyuki Tsuji

    Journal of Low Temperature Physics   Vol. 196   page: 170 - 176   2019

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    Publishing type:Research paper (scientific journal)  

    DOI: doi.org/10.1007/s10909-019-02192-9

  39. Periodic Oscillation of Liquid Helium Boiling in a Narrow Rectangular Duct Reviewed

    Y. Eikoku, K. Ishida, A. Iwamoto, Y. Tsuji

    Journal of Low Temperature Physics   Vol. 196   page: 6 - 12   2019

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    Publishing type:Research paper (scientific journal)  

    DOI: doi.org/10.1007/s10909-019-02193-8

  40. Instantaneous mass transfer measurement and its relation to large-scale structures in pipe flow

    Tong T., Tsuneyoshi T., Ito T., Tsuji Y.

    INTERNATIONAL JOURNAL OF HEAT AND FLUID FLOW   Vol. 71   page: 160-169   2018.6

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.ijheatfluidflow.2018.03.016

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  41. Further experiments for mean velocity profile of pipe flow at high Reynolds number

    Furuichi N., Terao Y., Wada Y., Tsuji Y.

    PHYSICS OF FLUIDS   Vol. 30 ( 5 )   2018.5

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1063/1.5017261

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  42. Numerical evidence of logarithmic regions in channel flow at Re-tau=8000

    Yamamoto Yoshinobu, Tsuji Yoshiyuki

    PHYSICAL REVIEW FLUIDS   Vol. 3 ( 1 )   2018.1

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1103/PhysRevFluids.3.012602

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  43. Lagrangian Trajectory od Small Particles in Superfluid HeII Reviewed

    Wataru Kubo, Yoshiyuki Tsuji

    Journal of Low Temperature Physics   Vol. 187 ( 5-6 ) page: 611 - 617   2017.6

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    Language:Japanese   Publishing type:Research paper (scientific journal)  

    DOI: 10.1007/s10909-017-1764-4

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  44. High Reynolds Number Experimental Facilities for Turbulent Pipe Flow at NMIJ

    Furuichi Noriyuki, Terao Yoshiya, Tsuji Yoshiyuki

    PROGRESS IN TURBULENCE VII   Vol. 196   page: 95-100   2017

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1007/978-3-319-57934-4_14

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  45. On flow structures associated with large wall mass transfer coefficients in orifice flows Reviewed

    Feng Shan, Zhichun Liu, Wei Liu, and Yoshiyuki Tsuji

    International Journal of Heat and Mass Transfer   Vol. 102   page: 1-9   2016.11

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)  

  46. Amplitude modulation of pressure in turbulent boundary layer Reviewed

    Yoshiyuki Tsuji, Ivan Marusic, and Arne V. Johansson

    International Journal of Heat and Fluid Flow   Vol. 61   page: 2-16   2016.10

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  47. 90度エルボ管流れにおける物質移行係数の点電極測定および異なる伝達条件におけるスカラー輸送のLES解析 Reviewed

    恒吉達矢, 伊藤高啓, 辻 義之

    日本機械学会論文集   Vol. 82 ( 834 )   2016

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    Authorship:Lead author   Language:Japanese   Publishing type:Research paper (scientific journal)  

    DOI: 10.1299/transjsme.15-00600

  48. Friction factor and mean velocity profile for pipe flow at high Reynolds numbers Reviewed

    Physics of Fluids   Vol. 27   page: 095108   2015

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)  

  49. オリフィス下流における物質移行係数の直接測定およびLESによる乱流スカラー輸送の解析 Reviewed

    恒吉達矢、神谷一彰、伊藤高啓、辻 義之

    日本機械学会論文集   Vol. 81 ( 828 ) page: 15-00162-15-00162   2015

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  50. 高レイノルズ数円管流における外層領域乱流統計量に関する実験的考察 Reviewed

    和田 裕貴、古市 紀之、寺尾 吉哉、辻 義之

    日本機械学会論文集   Vol. 81 ( 826 ) page: 15-00362   2015

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  51. 高レイノルズ数円管流における平均速度分布型に関する実験的研究 Reviewed

    和田裕貴、古市紀之、寺尾吉哉、辻 義之

    日本機械学会論文集   Vol. 81 ( 826 ) page: 15-00162-15-00162   2015

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  52. Fractality of self-grown nanostructured tungsten by He plasma irradation Reviewed

    Physics letters A   Vol. 378 ( 34 ) page: 2533-2538   2014.7

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  53. Effects of flow field on the wall mass transfer rate behind a circular orifice in a round pipe Reviewed

    Feng Shan , Atsushi Fujishiro, Tatsuya Tsuneyoshi, Yoshiyuki Tsuji

    International Journal of Heat and Mass Transfer   Vol. 73   page: 542-550   2014.2

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.ijheatmasstransfer.2014.02.039

  54. Particle image velocimetry measurements of flow field behind a circular square-edged orifice in a round pipe Reviewed

    Feng Shan, Atsushi Fujishiro, Tatsuya Tsuneyoshi, Yoshiyui Tsuji

    Experiments in Fluids   Vol. 54   page: 1553   2013.6

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1007/s00348-013-1553-z

  55. Pressure fluctuation in high-Reynolds-number turbulent boundary layer: results from experiments and DNS Invited Reviewed

      Vol. 13 ( 50 ) page: 1-19   2012.11

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1080/14685248.2012.734625

  56. Anisotropic pressure correlation spectra in turbulent shear fow Invited Reviewed

    Yoshiyuki Tsuji and Yukio Kaneda

    Journal of Fluid Mechanics   Vol. 694   page: 50-77   2012.2

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1017/jfm.2011.502

  57. Thermal turbulence in a confinrd cell Reviewed

    Fluid mechanics andits applications   Vol. 101   page: 128-135   2012

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)  

  58. Mean wind: Its velocity and temperature fluctuation in low-Prandtl-number thermal convection Reviewed

    Tomohiro Hayakawa, and Yoshiyuki Tsuji

    Physica D   Vol. 239   page: 1353-1358   2010.2

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.physd.2010.02.008

  59. High-Reynolds-number experiments: the challenge of understanding universality in turbulence Invited Reviewed

    Yoshiyuki Tsuji

    Fluid Dynamics Research   Vol. 41   page: 064003 (17pp)   2009.12

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1088/0169-5983/41/6/064003

  60. 流体乱流研究から診たプラズマ乱流データの解析:流体およびプラズマ乱流の普遍性

    辻  義之、田中宏彦、大野哲靖

    プラズマ核融合学会誌   Vol. 85 ( 11 ) page: 783-792   2009.10

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    Authorship:Lead author   Language:Japanese  

  61. 流体乱流研究から診たプラズマ乱流データの解析:組織構造の定義とその抽出

    辻  義之、田中宏彦、大野哲靖

    プラズマ核融合学会誌   Vol. 85 ( 11 ) page: 774-782   2009.10

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    Authorship:Lead author   Language:Japanese  

  62. 流体乱流研究から診たプラズマ乱流データの解析:相関とスペクトル解析

    辻  義之、田中宏彦、大野哲靖

    プラズマ核融合学会誌   Vol. 85 ( 9 ) page: 620-630   2009.8

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  63. 流体乱流研究から診たプラズマ乱流データの解析:確率密度関数とその応用

    辻  義之、田中宏彦、大野哲靖

    核融合プラスズマ学会誌   Vol. 85 ( 10 ) page: 665-673   2009.8

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  64. Direct total skin-friction measurement of a flat plate in zero-pressure-gradient boundary layers Reviewed

    Kiyoto Mori, Hiroki Imanishi, Yoshiyuki Tsuji1, Tomohiro Hattori, Masaharu Matsubara, Shinsuke Mochizuki, Masaru Inada, and Tadashi Kasiwagi

    Fluid Dynamics Research   Vol. 41   page: 021406 (19pp)   2009.3

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1088/0169-5983/41/2/021406

  65. *Pressure Statistics and its Scaling in High Reynolds Number Turbulent boundary Layers Reviewed

    Y. TsujiJ. M. FranssonH.AlfredssonA.V. Johansson

      Vol. 585   page: 1-40   2007

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  66. 乱流中の変動圧力の計測について Reviewed

    辻  義之今飯田 純阿部 浩幸

    日本機会学会論文集B編   Vol. 2 ( 719 ) page: 1710-1717   2006

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  67. エッジトーン現象によって噴流中に形成された組織構造の特徴:低圧領域と速度勾配テンソルによる構造の抽出 Reviewed

    河合 勇太辻  義之久木田 豊

    日本機会学会論文集B編   Vol. 72 ( 724 ) page: 3058-3065   2006

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  68. エッジトーン現象によって噴流中に形成された組織構造の特徴 (第1報, レイノルズ応力と乱れの生成項からの考察) Reviewed

    河合 勇太辻  義之久木田 豊

    日本機械学會論文集B編   Vol. 72 ( 716 ) page: 915-923   2006

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    Authorship:Lead author   Language:Japanese   Publishing type:Research paper (scientific journal)  

  69. *Mean Wind in Convective Turbulence of Mercury Reviewed

    Yoshiyuki TsujiTakatoshiMizunoTakashi MashikoMasaki Sano

      Vol. 94   page: 034501   2005

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  70. *Self-similar Profile ofProbability Density Functions in Zero-pressure Gradient Turbulent Boundary Layers Reviewed

    Y. TsujiB. LindgrenA.V. Johansson

    Fluid Dynamical Research   Vol. 37   page: 293-316   2005

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  71. 平板乱流境界層対数速度分布領域における変動速度確率密度関数の特性 第三報:対数法則領域における整構造の役割 Reviewed

    辻  義之宮地 圭鈴木 孝裕中村 育雄

    日本機会学会論文集B編   Vol. 70 ( 695 ) page: 1679-1686   2004

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  72. Universality of Probability Density Distributions in the Overlap Region in High Reynolds Number Turbulent Boundary Layers Reviewed

    Lindgren, B.Johansson, A. V.Tsuji, Y.

      Vol. 16   page: 2587-2591   2004

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  73. Instantaneous Measurement of Velocity Fields in Developed Thermal Turbulence in Mercury

      Vol. 69   page: 036306   2004

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  74. Intermittency Effect on Energy Spectrum in High-Reynolds Number Turbulence Reviewed

    Yoshiyuki Tsuji

    Phys. of Fluids   Vol. 16   page: 43-46   2004

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  75. 二次元噴流と平行に置かれた平板との衝突により形成される渦構造のスケールと乱れの分布 Reviewed

    河合 勇太 辻  義之 久木田 豊

    日本機会学会論文集B編   Vol. 70 ( 692 ) page: 935-942   2004

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  76. Large-scale Anisotropy Effect on Small-scale Statistics over Rough Wall Turbulent Boundary Layers Reviewed

    Yoshiyuki Tsuji

    Physics of Fluids   Vol. 12   page: 3816-3828,   2003

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  77. *Similarity Scaling of Pressure Fluctuation in Turbulence Reviewed

    Yoshiyuki Tsuji and Takashi Ishihara

      Vol. 68   page: 026309   2003

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  78. 平板乱流境界層対数速度分布領域における変動速度確率密度関数の特性 Reviewed

    辻  義之、宮地 圭、中村 育雄

    日本機械学会論文集B偏   Vol. 68   page: 785-792   2002

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  79. 自由界面上のリップル形成に関する実験的研究 Reviewed

    辻  義之野沢 幸司関  紘介久木田 豊

    日本機械学会論文集B偏   Vol. 68   page: 1841-1848   2002

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  80. Application of Ultrasonic Velocimetory to Vortex Shedding and Empirical Eigenfunctional Analysis Reviewed

    Takahiro Ito, Yoshiyuki Tsuji, Yutaka Kukita

      Vol. 3   page: 324-335   2001

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  81. *Peak Position of Dissipation Spectrum in Low Reynolds Number Turbulent Boundary Layers Reviewed

    Yoshiyuki Tsuji

    Physical Rev. E   Vol. 59 ( 6 ) page: 7235   1999

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  82. Probability Density Function in the Log-law Region of Low Reynolds Number Turbulent Boundary Layer

    Physics of Fluids   Vol. 11 ( 3 ) page: 647   1999

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  83. Initial Free-Surface instabilities on High-Speed Water JetSimulating Liquid-Metal Target

    Fusion Technology   Vol. 36   page: 69   1999

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  84. Interface Waves Excited by Vertical Vibration of StratifiedFluids in a Circular Cylinder

    Journal of Nuclear Science and Technology   Vol. 36 ( 6 ) page: 508   1999

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  85. Fractal Analysis of a Circulating Flow Field with Two Different Velocity Laws

    European Journal of Mech., B/Fluids   Vol. 18   page: 959   1999

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  86. On the Intermittency Feature of Shear Stress Fluctuation in High-Reynolds Number Turbulence

    Physics of Fluids   Vol. 11 ( 10 ) page: 3017   1999

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  87. Transverse Structure Functions in High-Reynolds-Number Turbulence

    Phys. Rev. E   Vol. 56   page: R4928   1998

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  88. On the Intermittency Feature od Shear Stress Fluctuation in Turbulence

    Journal of Physical Society of Japan   Vol. 67 ( 4 ) page: 1234   1998

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  89. On the Intermittency Feature of Shear Stress Fluctuation in Turbulence

    Journal of physical Society of Japan   Vol. 67 ( 4 ) page: 1234   1998

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  90. An Experimental Study on Inferfacial Friction in Wavy-stratified Two-phase Flow in a Horizontal Rectangular Duct

      Vol. 39 ( 8 ) page: 57   1997

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  91. The characteristics of Probability Density Function in the Log-law Region in Turbulent Boundary Layer

      Vol. 63 ( 613 ) page: 2977   1997

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  92. Transverse Structure Functions in High Reynolds Number Turbulence

    Physical Rev. E   Vol. 56   page: R4298   1997

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  93. 平板乱流境界層対数速度分布領域における変動速度確率密度関数の特性

    日本機会学会論文集(B編)   Vol. 63 ( 613 ) page: 75   1997

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  94. Recoupling and Decoupling of Parallel Loops in Simulated PIUS-type Reactor Shutdown and Restort Transients

    Jownal of Nuclear Science and Technology   Vol. 34 ( 11 ) page: 1067   1997

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  95. Visualizalion and Correlation Analysis of Counter-Current Two-phase Flow in a Thermosyphon by Neutron Radiogrophy

    Nuclear Instruments and Methods in phys Reseach A   Vol. 377   page: 148   1996

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  96. Simulation of Turbulent Velocity with Fractol Brownian Motion

      Vol. 61 ( 588 ) page: 2861   1995

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  97. Some Progress in the Research of Dynamical Structure in wall torbulence

    JSME International Journal   Vol. 38 ( 1 ) page: 335   1995

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  98. The Fractal Aspect of an Iso-velocity Set and its Relationship to the Bursting Phenomena in the Turbulent Boundary Layer

    Phys. of Fluids   Vol. 6 ( 10 ) page: 3429   1994

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  99. Fractal Aspect of Iso-velocity Set in a Turbulent Boundary Layer

    JSME International Journal   Vol. 36 ( 1 ) page: 93   1993

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  100. The Fractal Distribution of Bursting Phenomena in Turbulent Boundary Laycr.

    FORMA   Vol. 8   page: 119-131   1993

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  101. The Analysis of Coherent Structure in Turbulent Boundary Layer by Karhunen-Lo(]E85EE[)ve expansion based on space Correlation

    Fluid and Heat Engineering Research   Vol. 28 ( 1 ) page: 27   1993

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  102. The Fractal aspect of lso-velocity sets in a turbulent boundary layer. 2nd Report, Relationship to the Reynolds stress

      Vol. 58 ( 547 ) page: 706   1992

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  103. Study on dynamical properties of intermitteeut phenomena in turbuleut boundary layer

    Yoshiyuki Tsuji, Katsuya Honda, Ikuo Nakamura, and Shinichi Sato

    Journal of physical society of Japan   Vol. 61   page: 10-14   1992

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  104. The Fractal aspect of iso-velocitysets in a turbulent boundary layer. 3rd Report, Relationship to the Bursting

      Vol. 58 ( 553 ) page: 2722   1992

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  105. Is intermittent motion of outer flow in the turbulent boundary Layer deterministic chaos? Reviewed

    Yoshiyuki Tsuji, Katsuya Honda, Ikuo Nakamura,and Shinichi Sato

    Physics of Fluids A   Vol. 3 ( 8 ) page: 1941-1946   1991.8

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  106. The Fractal aspect of lso-velocity sets in a turbulent boundary layer

      Vol. 57 ( 540 ) page: 2554   1991

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Presentations 13

  1. 量子流体乱流のスペクトル

    吉田 恭、三浦英昭、辻 義之

    京大 数理解析研究所 共同研究 (公開型)、「乱流の普遍性:空間次元依存性」  2021.3.8 

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    Event date: 2021.3

    Language:Japanese   Presentation type:Oral presentation (general)  

  2. T字管合流部における流れ加速型腐食に関する物質輸送のLES

    小林 篤史,恒吉 達矢,辻 義之

    第34回 数値流体シンポジウム(CFD34)  2020.12.23 

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    Event date: 2020.12

    Language:Japanese  

  3. 機械学習による発達乱流場における速度欠損データの予測手法の確立

    櫻井 雄基,恒吉 達矢,辻 義之

    日本原子力学会中部支部 第 52 回研究発表会  2020.12.17 

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    Event date: 2020.12

    Language:Japanese   Presentation type:Oral presentation (general)  

  4. 流れ加速型腐食による配管減肉予測のための電気化学的計測手法を用いた物質伝達計測に関する研究

    髙垣 連、恒吉 達矢、辻 義之

    日本原子力学会中部支部 第 52 回研究発表会  2020.12.18 

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    Event date: 2020.12

    Language:Japanese   Presentation type:Oral presentation (general)  

  5. 一様等方乱流場に局在する流れの PIV 計測

    小栗 功聖,恒吉 達矢,辻 義之

    日本原子力学会中部支部 第 52 回研究発表会  2020.12.17 

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    Event date: 2020.12

    Language:Japanese   Presentation type:Oral presentation (general)  

  6. 超流動ヘリウム流動場における量子渦の可視化に関する研究

    上㙒 直紀,脇 慎一郎,恒吉 達矢,辻 義之

    日本原子力学会中部支部 第 52 回研究発表会  2020.12.17 

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    Event date: 2020.12

    Language:Japanese   Presentation type:Oral presentation (general)  

  7. 非一様な熱カウンター流に追従する微小粒子の速度分布に関する研究

    陳 麗竹,丸山 巧,恒吉 達矢,辻 義之

    日本機械学会第98期工学部門講演会、日本機械学会(オンライン開催)  2020.11.11 

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    Event date: 2020.11

    Language:Japanese   Presentation type:Oral presentation (general)  

  8. On the propagation of the pressure fluctuations in turbulent channels at high Reynolds numbers

    Ali MEHREZ, Yoshinobu YAMAMOTO ,Yoshiyuki TSUJI

    2020.11.11 

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    Event date: 2020.11

    Language:English   Presentation type:Oral presentation (general)  

  9. 超流動ヘリウム内での液中放電を用いたヘリウムエキシマ生成に関する研究

    脇 慎一郎,丸山 巧,鈴木 颯,Volker Sonnenchein,富田英生,辻 義之,井口哲夫

    第18回日本流体力学会中部支部講演会  2020.11.7 

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    Event date: 2020.11

    Language:Japanese   Presentation type:Oral presentation (general)  

  10. Pre-multiplied Spectra of Low Reynolds Number Large Motions in Channel Flow International conference

    Wang Yu, Akinobu Nasun, Ali Meherz, Tatsuya Tsuneyoshi, Yoshiyuki Tsuji

    The 17th International Conference on Flow Dynamics (ICFD2020)  2020.10.29 

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    Event date: 2020.10

    Language:English   Presentation type:Oral presentation (general)  

  11. Identification of Vortex Structures in Flow using Tomographic PIV International conference

    Kovid Bhatt, Tong Tong(2.3.D修), Tatsuya Tsuneyoshi, Yoshiyuki Tsuji

    International Conference on Flow Dynamics (ICFD2020)  2020.10.29 

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    Event date: 2020.10

    Language:English   Presentation type:Oral presentation (general)  

  12. 外層の大規模スケールを考慮した壁面近傍の乱流統計量の予測モデルの構築の試み

    水野 弘輝,恒吉達矢,辻 義之,山本義暢

    日本流体力学会年会2020、山口大学常盤キャンパス(オンライン開催)  2020.9.18 

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    Event date: 2020.9

    Language:Japanese   Presentation type:Oral presentation (general)  

  13. チャネル及び境界層乱流におけるAM相関係数と時空間相関係数の関係

    王 宇,那須野 晃伸,Ali Meherz,恒吉 達矢,辻 義之

    日本機械学会2020年度年次大会、名古屋大学東山キャンパス(オンライン開催)  2020.9.14 

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    Event date: 2020.9

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KAKENHI (Grants-in-Aid for Scientific Research) 19

  1. 放射線を用いた量子乱流場の可視化法の開発

    Grant number:22K18768  2022.6 - 2024.3

    科学研究費助成事業  挑戦的研究(萌芽)

    辻 義之

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    Grant amount:\6370000 ( Direct Cost: \4900000 、 Indirect Cost:\1470000 )

    量子乱流場は、超流動と常流動成分が混在する複雑乱流場である。常流動成分は水や空気の流れと同様に粘性乱流としてふるまい、乱流中には微細な渦構造(乱流渦)が存在する。一方、超流動成分中にも量子渦と呼ばれる旋回を伴う渦構造が存在する。本研究では、新たな可視化粒子としてヘリウムエキシマを用いる。エキシマはヘリウム原子に電子を衝突させることで電荷を持たせ、別のヘリウム原子と結合した状態である。エキシマの生成には放射線(中性子、ガンマ線)及びプラズマ発光を利用する。エキシマによる流動場可視化と量子渦の運動を定量化することで複雑乱流の新たな知見を得ることを目的とする。

  2. Establishment of scaling law for wall-bounded turbulence based on dissipation rate measurement

    Grant number:22H01404  2022.4 - 2025.3

    Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (B)

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    Authorship:Coinvestigator(s) 

  3. A Study on Turbulent Frictional Resistance Reduction Method by Suppressing Turbulent Fluctuation Using Acoustic Streaming Radiation

    Grant number:20H02379  2020.4 - 2023.3

    Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (B)

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    Authorship:Coinvestigator(s)  Grant type:Competitive

    Direct Cost: \450000 、 Indirect Cost:\37800 )

  4. International collaborative research work for friction factor and universal velocity profile in high Reynolds number pipe flow

    Grant number:19KK0098  2019.10 - 2023.3

    Grants-in-Aid for Scientific Research  Fund for the Promotion of Joint International Research (Fostering Joint International Research (B))

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    Authorship:Coinvestigator(s)  Grant type:Competitive

    Direct Cost: \50000 、 Indirect Cost:\42000 )

  5. 渦運動による流体方程式の特異性と乱流の統計性の解明

    Grant number:19H00641  2019.4 - 2024.3

    科学研究費助成事業  基盤研究(A)

    木村 芳文, 辻 義之, 藤原 宏志, 金田 行雄, 坂上 貴之, 松本 剛

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    Authorship:Coinvestigator(s)  Grant type:Competitive

    Direct Cost: \250000 )

    流体方程式の適切性/特異性の解明は流体方程式の数値解析の理論的裏付けとして多くの分野にまたがる基礎的な問題である一方,流体の最大の未解決問題である乱流の理解と制御に決定的な役割を果たすことから数学のミレニアム問題の一つにも挙げられている大問題である.本研究課題は渦運動の視点から流体方程式の特異性とそれに関わる乱流の統計性の問題を戦略的に研究することを目的としており,理論・モデル解析と大規模数値解析を融合させることによってこれまでの特異点探索における困難を克服し,乱流の解明と制御への筋道をつけるとともにミレニアム問題の解決に導くブレークスルーの達成を目指している.
    流体方程式の適切性/特異性の解明は流体方程式の数値解析の理論的裏付けとして多くの分野にまたがる基礎的な問題である一方,流体の最大の未解決問題である乱流の理解と制御に決定的な役割を果たすことから数学のミレニアム問題の一つにも挙げられている大問題である.本研究課題は 渦運動の視点から流体方程式の特異性とそれに関わる乱流の統計性の問題を戦略的に研究することを目的としている.学術的な「問い」として(1)流体方程式の特異性を正確に捉えるための方法論,(2)乱流中の渦フィラメントの安定化問題,(3)渦リコネクションにおける特異点の正則化問題,(4)渦フィラメントの特異性と乱流の統計性の問題,(5)渦フィラメントの相互作用についてのリモートセンシングを掲げ, 理論・モデル解析と大規模数値解析を融合させることによってこれまでの特異点探索における困難を克服し,これらの「問い」に答えることを目的とし.この解決によって乱流の解明と制御への筋道をつけるとともにミレニアム問題の解決に導くブレークスルーの達成を目指している.
    本年度は初年度として古典流体における渦リコネクションの問題を推進した. 木村はMoffatt & Kimura (2019a, b)で得られた結果と比較するためにkIda, Takaoka, Hussain (1984) の手法を用いてガウシアン型のコアを持つ2つの傾いた渦輪を対称に配置した初期条件に対してNavier-Stokes方程式の直接数値計算(DNS)を実行した.計算は名古屋大学情報基盤センターのスーパーコンピュータ(FX100)を用いて1024^3の格子点を用いて計算を行った.結果としてDNSでは2つの渦輪の最近接点における曲率が成長せず,最大渦度がオーバーシュートできないことが観測された.この結果は途中経過としてシアトルで開催されたアメリカ物理学会で発表された.
    前述のように昨年度の研究はMoffatt & Kimura (2019a,b)で得られた結果のDNSによる検証が一つの重要な課題であり,名古屋大学情報基盤センターのスーパーコンピュータ(FX100)使用による大規模数値シミュレーションの実施とそのデータ解析と理論との比較が研究代表者の主な業績であった.最大渦度の発展が力学系による予測とDNSで大きく異なることは,新たな研究のテーマを与える重要な観察であると考える.DNSで渦管に沿っての曲率が発展しないことはそれが渦輪の最近接点付近のメッシュ数の欠乏に拠るものなのか,それともMoffatt & Kimura (2019a,b)の力学系モデルとは異なる物理的な条件に拠るものなのかは現在のところ不明であるが今後それを明らかにすることは今後の大きな問題である.
    研究分担者の藤原は博士後期課程の院生との共同研究でプログラムの並列化と厳密化によりKimura & Moffatt (2018)の捻れた渦輪におけるBiot-Savart モデルによる特異性の結果を検証するとともにさらに精度を上げる成果を上げつつある.以上、全体としてほぼ目的を達成することができ計画は順調に進展していると言える。
    これまでの成果を踏まえて、以下の研究を推進し、結果をまとめていく。(1)大規模数値解析の実施:名古屋大学情報基盤センターにおいて令和2年度に新たに導入され7月より稼働するスーパーコンピュータ(FUJITSU PRIMEHPC FX1000)を用いて対称な2つの傾いた渦輪を初期条件とするNavier-Stokes方程式の直接数値計算(DNS)を行い,力学系による予想とDNSとの違いについて考察を行う.(2)分担者の藤原と共同し,Biot-Savartモデルの数値解析の改良を行い,セグメントの長さを渦度の伸長の度合いによって調整できるような数値解析法を導入し,より精密な特異性の解析を可能にする.(3)分担者の金田との共同研究の一環としてNavier-Stokes方程式のDNSコードの改良を行い,渦度の大きさに応じてのアダプティブなメッシュ間隔が実現できるようなスキームの構築を目指し,力学系モデルとDNSの結果の乖離の原因を追究する.(4)Moffatt & Kimura (2019a,b)の力学系の解に対応して2つの傾渦輪がリコネクション時に生成する渦音の音圧をLighthill の理論をもとに考察する.力学系の考察では渦度の時間発展はリコネクション時近傍で非常に特異的になり,大きな渦音が生成されることが予想できる.

  6. 量子乱流の普遍性と統計法則の解明

    Grant number:19H00747  2019.4 - 2023.3

    科学研究費助成事業  基盤研究(A)

    辻 義之, 山本 義暢

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    Authorship:Principal investigator  Grant type:Competitive

    Grant amount:\44070000 ( Direct Cost: \33900000 、 Indirect Cost:\10170000 )

    液体ヘリウムは絶対温度2.17Kにおいて、その粘性が消失する超流動ヘリウム(HeII)へと相転移する。HeIIでは量子渦が複雑に絡み合うタングルが形成され、発達乱流場の普遍的性質を内在すると考えられる。微細粒子を用いた速度場のラグランジュ計測から、量子乱流場の普遍法則(Kolmogorov則や対数法則)を検証するとともに、その普遍性が成立する背景を量子渦の自己組織化を介して明らかにする。水や空気など古典乱流がそなえるリチャードソン・カスケードと比較することで、運動量やエネルギー輸送をになう物理機構を解き明かし、広く複雑乱流の普遍性を理解することを目的とする。
    今年度は以下の項目について研究を実施した。その概要をまとめる。
    [A] 量子渦のラグランジュ軌道解析によるKolmogorovスペクトルの算出:3次元的なラグランジュ軌道の計測を目的とした複数台カメラでの計測を実施した。キャリブレーションの精度を向上させることで、三次元的軌道の再構築ができることを確認した。軌道を追尾できる時間間隔が小さいため、光学系の改善をおこなうことで、統計量の算出をより高精度化ができることを明らかにした。
    [B]壁乱流における平均速度分布の計測:正方形ダクト内に微細粒子(個体水素)播種して、そのラグランジュ速度を計測することから、微細粒子が量子渦との相互作用をする時間スケールをフラクタル解析から見積もり、個体壁からの影響を定量化することができた。
    [C]Heエキシマを利用した速度計測法の開発:プラズマ放電を利用したエキシマの生成をおこない、その発生を分光スペクトルにより確認できた。直流放電にすることで、より安定に放電を持続することができるが、リーク電流が発生しやす事がわかり、その改善を進める予定である。
    [D]乱流の普遍性の理解、量子乱流と古典乱流との統一的理解:微細粒子のラグランジュ軌道の解析から、ハースト指数の算出によって自己相似的な軌道の出現と、過去および未来の記憶効果が存在することを実験データの解析から明らかにした。この統計的性質は古典乱流、量子乱流ともに内在しており、両者の普遍性をより深く解釈できる可能性を示唆している。今後は量子渦間距離の見積もりを試みたい。
    感染症の拡大により、実験が制約された。計測器の調達も滞りがあったが、研究期間を延長することで、計画を遂行できた。
    これまでの成果を踏まえ、三次元計測の精度をあげる。量子渦の挙動を解明することと古典乱流との接点を見出し、高レイノルズ数乱流の普遍性を調べる。エキシマをトレーサとする可視化法を確立できるように進めていく。

  7. Three-dimensional vortical structures and Lagrange velocity measurements

    Grant number:16K14158  2016.4 - 2018.3

    TSUJI Yoshiyuki

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    Authorship:Principal investigator 

    Grant amount:\3510000 ( Direct Cost: \2700000 、 Indirect Cost:\810000 )

    The three-dimensional visualization system was constructed with 4 high-speed cameras. And the Lagrange trajectories are recorded in a short period of time. The camera system, small luminescence particles, laser system, and optical systems were improved. This visualization system enables us to obtain the velocity filed in space and the small eddy structures are visualized by means of 2nd invariant of velocity gradient tensor. For applying to the visualization of quantum eddy, each camera is connected with one another by ran cables and is synchronized by trigger input signal. Small particle trajectories are recorded at 4 different times. Lagrange velocity and acceleration were calculated and their probability density functions are analyzed in the counter flow. Changing the heater power, the counter flow pattern varies, and their statistical properties are studied.

  8. 超流動乱流における量子渦の可視化と普遍的エネルギースペクトルの解明

    2015.4

    科学研究費補助金  基盤研究(B)

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  9. Visualization of quantum vortex structures and the energy spectrum in super fluid turbulence

    Grant number:15H03917  2015.4 - 2018.3

    TSUJI Yoshiyuki

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    Authorship:Principal investigator 

    Grant amount:\16640000 ( Direct Cost: \12800000 、 Indirect Cost:\3840000 )

    The visualization system was improved and the small particle motions in the superfluid could be visualized. The particle sizes are order of 1 micro meter. The boundary between particle and background was clearly distinguished and then the Lagrange trajectory of small particle was identified by image processing system. Based on these improvements of experimental procedure, the Lagrange particle trajectories are visualized and their statistical statistics are analyzed. The power-law exponent of velocity structure functions, which is equivalent to Lagrange spectral exponent, was derived. It was found that there are two different slope regions. The small scale is affected by the quantum vortex and large scale shows the uniform motion. The probability density function of Lagrange velocity and acceleration indicates that they are strongly dependent on the particle sizes and the ratio of super fluid density.

  10. Study for universal function of friction coefficient and velocity profile in pipe flow at high Reynolds number

    Grant number:15H03923  2015.4 - 2018.3

    Furuichi Noriyuki

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    Authorship:Coinvestigator(s) 

    An universal relation between the friction factor and velocity profile in a pipe flow at high Reynolds number was studied. The most important feature of this experiment is to obtain a flow rate with high accuracy using high Reynolds number actual flow facility. The high accurate flow rate measurement brings a high accurate friction velocity and Reynolds number. The velocity profile was measured using LDV and the measurement results was validated in detail. Especially, we indicated that the friction factor obtained by the direct integration of velocity profile and measurement friction factor by the pressure drop agrees very well. Based on this result, Karman constant which is the inclination in log-law velocity profile, is estimated to be 0.384. This value is nice agreement with the other canonical flows such as boundary layer and channel flow.

  11. Study of the dynamics and anisotropy of flow structures in turbulence by large scale numerical analysis

    Grant number:25247014  2013.4 - 2018.3

    Kimura Yoshifumi

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    Authorship:Coinvestigator(s) 

    The objective of this research project was to study the dynamics and singularity of flow structures such as vortices and waves in turbulence using a large scale computer simulations. We placed astrophysical- and geophysical turbulence as the main research target because the anisotropy of flow structures plays the essential role in them. As the major achievements of the project, we can raise (1) clarification of the mechanism of development of the energy spectrum for stably stratified turbulence, and (2) understanding of singularity and characteristic geometrical features in the vortex reconnection process. In particular, it is realized that the second result is largely related to the problem of regularity of the Navier-Stokes equations, one of the seven millennium problems by the Clay Mathematical Institute.

  12. 中性子を用いた量子乱流渦の検出法の開発

    2012.4 - 2014.3

    科学研究費補助金  挑戦的萌芽研究24656120

  13. 超流動乱流における量子渦の可視化法の開発と圧力変動計測による乱流普遍則の解明

    2011.4 - 2014.3

    科学研究費補助金  基盤研究(B)

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  14. 高レイノルズ数乱流境界層における圧力統計量の普遍性の解明と大規模組織構造との関連

    2008.4 - 2011.3

    科学研究費補助金  基盤研究(B)

    辻 義之

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    Authorship:Principal investigator 

  15. 熱乱流における速度境界層の直接測定と巨視的流動パターンの解明

    2006.4 - 2008.3

    科学研究費補助金  基盤研究(C)

  16. 多点速度と変動圧力の同時測定に基づく乱流微細構造と普遍法則の解明

    2001.4 - 2003.3

    科学研究費補助金  基盤研究(C)

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    Authorship:Principal investigator 

  17. KL展開と情報幾何学に基づく壁乱流の普遍的速度スケーリングに関する研究

    1998.4 - 2000.3

    科学研究費補助金  基盤研究(C)

  18. 固有安全炉における熱水力挙動およびヒートパイプによる余熱除去システムに関する研究

    1996.4 - 1998.3

    科学研究費補助金  基盤研究(C)

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    Authorship:Coinvestigator(s) 

  19. フラクタルブラウン運動による乱流速度場の表現

    1995.4 - 1996.3

    科学研究費補助金  奨励研究(A)07750189

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    Authorship:Principal investigator 

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Teaching Experience (On-campus) 3

  1. Foundations of Mechanics I

    2011

  2. 統計力学A,B

    2001

  3. エネルギーシステム工学基礎

    2001