Hiromichi KOBAYASHI

Hiromichi KOBAYASHI

Ph.D.
  • Research Field :
    Physics
  • Specific Research Topic :
    Fluid Mechanics, Large-eddy Simulation (LES), Turbulence Modeling, Magnetohydrodynamics (MHD), Plasma Physics

Research Description

Subgrid-scale modeling in LES for complex geometry, Study on turbulent phenomena of MHD flows, MHD power generation using plasma and liquid metal, Coupled dynamics of two fluid model in superfluid 4He, Chiral turbulence with symmetry braking

Material

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Vortex structure in homogeneous isotropic turbulence.

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Vortex structure in turbulent channel flow

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Vortex structure near fuel injection in gas turbine

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Turbulent structure in liquid metal turbulent duct flow locally applying magnetic field

Selected Journal Publications

  1. Klein, M, Ketterl, S., Engelmann, L., Kempf, A., Kobayashi, H. (2020) Regularised, parameter free scale similarity type models for Large Eddy Simulation. International Journal of Heat and Fluid Flow 81: 108496

     doi
  2. Kobayashi, H., Yui, S., Tsubota, M. (2019) Numerical Study on Entrance Length in Thermal Counterflow of Superfluid 4He. Journal of Low Temperature Physics 196: 35-41

     doi
  3. Kobayashi, H. (2018) Improvement of SGS model using scale-similarity model based on analysis of SGS force and SGS energy transfer. International Journal of Heat and Fluid Flow 72: 329-336

     doi
  4. Yui, S., Tsubota, M., Kobayashi, H. (2018) Three-Dimensional Coupled Dynamics of the Two-Fluid Model in Superfluid 4He: Deformed Velocity Profile of Normal Fluid in Thermal Counterflow.  Physical Review Letters 120: 155301

     doi
  5. Kobayashi, H., Okuno, Y. (2016) Turbulent and Electrical Phenomena in a Liquid Metal MHD Energy Conversion Device under Various Load Conditions. IEEJ Transactions on Power and Energy 136: 773-778

     doi
  6. Sugimoto N., Ishioka K., Kobayashi H., and Shimomura Y. (2015) Cyclone-anticyclone asymmetry in gravity wave radiation from a co-rotating vortex pair in rotating shallow water. Journal of Fluid Mechanics 772: 80-106.

     doi
  7. Yoshizawa, A., Kobayashi, H., Sugimoto, N., Yokoi, N., Shimomura, Y. (2013) A Reynolds-averaged turbulence modeling approach to the maintenance of the Venus superrotation. Geophysical & Astrophysical Fluid Dynamics 107, 6: 614-639

     doi
  8. Kobayashi, H., Shionoya, H., Okuno, Y.  (2012)  Turbulent duct flows in a liquid metal magnetohydrodynamic power generator.  Journal of Fluid Mechanics  713: 243-270 

    doi
  9. Onodera, N., Aoki, T.Kobayashi, H. (2011) Large-Eddy Simulation of Turbulent Channel Flows with Conservative IDO Scheme. Journal of Computational Physics 230, 14: 5785-5805

    doi
  10. Kobayashi, H., Matsumoto, E., Fukushima, N., Tanahashi, M., Miyauchi, T. (2011) Statistical properties of the local structure of homogeneous isotropic turbulence and turbulent channel flows. Journal of Turbulence 12, 11: 1-16

    doi
  11. Kobayashi, H., Ham, F., Wu, X. (2008) Application of a local SGS model based on coherent structures to complex geometries. Int J Heat Fluid Flow 29: 640- 653

    doi
  12. Kobayashi, H. (2008) Large eddy simulation of magnetohydrodynamic turbulent duct flows. Phys Fluids 20: 015102

    doi
  13. Kobayashi, H.  (2006)  Large eddy simulation of magnetohydrodynamic turbulent channel flows with local subgrid-scale model based on coherent structures  Phys. Fluids  18: 045107 

    doi
  14. Kobayashi, H. (2005) The subgrid-scale models based on coherent structures for rotating homogeneous turbulence and turbulent channel flow. Phys Fluids 17: 045104

    doi
  15. Kobayashi, H., Shimomura, Y. (2001) The Performance of Dynamic Subgrid-Scale Models in the Large Eddy Simulation of Rotating Homogeneous Turbulence. Phys Fluids 13: 2350-2360

    doi
  16. Kobayashi, H., Okuno, Y, Kabashima, S. (1998) Three-Dimensional Structures of MHD Flow in a Disk Generator. IEEE Trans Plasma Science 26: 1526-1531

    doi

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