Hiromichi KOBAYASHI

Ph.D.

Research Field :

Physics
E-mail :

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

Yui, S., Tang, Y., Guo, W., Kobayashi, H., Tsubota, M. (2022) Universal Anomalous Diffusion of Quantized Vortices in Ultraquantum Turbulence. Physical Review Letters129: 025301 (Editors' Suggestion)
Inagaki, K., Kobayashi, H. (2022) Transport and modeling of subgrid-scale turbulent kinetic energy in channel flows. AIP Advances12: 045222
Hasegawa, H., Aoki, T., Kobayashi, H., Idomura, Y., Onodera, N. (2021) Tree Cutting Approach for Domain Partitioning on Forest-of-Octrees-based Block-structured Static Adaptive Mesh Refinement with Lattice Boltzmann Method. Parallel ComputingVol.108, 102851
Sasaki, R., Fujino, T., Takana, H., Kobayashi, H. (2021) Theoretical analysis of annular laminar flows with MHD interaction driven by rotating co-axial　cylinder. Electron Comm JpnVol.104, No.2, pp.1-9
Inagaki, K., Kobayashi, H.(2020) Role of various scale-similarity models in stabilized mixed subgrid-scale model. Physics of Fluids 31: 075108
Yui, S., Kobayashi, H., Tsubota, M., Guo. W. (2020) Fully Coupled Two-Fluid Dynamics in Superfluid 4He: Anomalous Anisotropic Velocity Fluctuations in Counterflow. Physical Review Letters124: 155301
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 Flow81: 108496
Kobayashi, H., Yui, S., Tsubota, M. (2019) Numerical Study on Entrance Length in Thermal Counterflow of Superfluid 4He. Journal of Low Temperature Physics196: 35-41
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 Flow72: 329-336
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 Letters120: 155301
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 Energy136: 773-778
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 Mechanics772: 80-106.
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 Dynamics107, 6: 614-639
Kobayashi, H., Shionoya, H., Okuno, Y. (2012) Turbulent duct flows in a liquid metal magnetohydrodynamic power generator. Journal of Fluid Mechanics713: 243-270
Kobayashi, H., Matsumoto, E., Fukushima, N., Tanahashi, M., Miyauchi, Ueda M. (2011) Statistical properties of the local structure of homogeneous isotropic turbulence and turbulent channel flows. Journal of Turbulence12 (11) : 1-16
Onodera, N., Aoki, T., Kobayashi, H.(2011) Large-Eddy Simulation of Turbulent Channel Flows with Conservative IDO Scheme. Journal of Computational Physics230 (14) : 5785-5805
Kobayashi H. (2008) Large eddy simulation of magnetohydrodynamic turbulent duct flows. Phys Fluids20: 015102
Kobayashi H., Ham F., Wu, X. (2008) Application of a local SGS model based on coherent structures to complex geometries. Int J Heat Fluid Flow29: 640- 653
Kobayashi, H.(2006) Large eddy simulation of magnetohydrodynamic turbulent channel flows with local subgrid-scale model based on coherent structures Phys. Fluids18: 045107
Kobayashi H.(2005) The subgrid-scale models based on coherent structures for rotating homogeneous turbulence and turbulent channel flow. Phys Fluids17: 045104
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
Kobayashi H., Okuno Y., Kabashima S. (1998) Three-Dimensional Structures of MHD Flow in a Disk Generator. IEEE Trans Plasma Science26: 1526-1531

Hiromichi KOBAYASHI

Research Description

Material

Selected Journal Publications

People