HAMBA Fujihiro

J-GLOBAL         Last updated: Jan 9, 2020 at 18:01
 
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Name
HAMBA Fujihiro
Affiliation
The University of Tokyo
Section
Institute of Industrial Science, (Department of Fundamental Engineering)
Job title
Professor
Degree
-(The University of Tokyo)

Research Interests

 
 

Research Areas

 
 

Academic & Professional Experience

 
1993
 - 
1996
Lecturer, Institute of Industrial Science, University of Tokyo
 
1996
 - 
2009
Associate Professor, Institute of Industrial Science, University of Tokyo
 
2009
 - 
Today
Professor, Institute of Industrial Science, University of Tokyo
 

Education

 
1981
 - 
1985
Department of Physics, Faculty of Science, The University of Tokyo
 
1985
 - 
1990
Graduate School, Division of Science, The University of Tokyo
 

Published Papers

 
Mizuki Kuroha, Shohei Nambu, Shingo Hattori, Yuichi Kitagawa, Kazuhiro Niimura, Yuki Mizuno, Fujihiro Hamba, Kazuyuki Ishii
Angewandte Chemie - International Edition   58 18454-18459   Dec 2019
© 2019 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim Fluid dynamics, resulting from the macroscopic mechanical rotation of either a rotary evaporator or a magnetic stirrer, has been shown to selectively induce one of two enantiomers (mirror-image s...
Fujihiro Hamba
Physical Review Fluids   4    Nov 2019
© 2019 American Physical Society. Analysis of the energy transfer in scale space, in addition to the energy transport in physical space, is useful for obtaining a better understanding of inhomogeneous turbulence. In this work, the energy transfer ...
Kazuhiro Inagaki, Taketo Ariki, Fujihiro Hamba
Physical Review Fluids   4    Nov 2019
© 2019 American Physical Society. In this study, realizable algebraic Reynolds stress modeling based on the square root tensor [Phys. Rev. E 92, 053010 (2015)10.1103/PhysRevE.92.053010] is further developed for extending its applicability to more ...
Fujihiro Hamba, Kouta Kanamoto
Theoretical and Computational Fluid Dynamics   33 181-196   Apr 2019
© 2019, Springer-Verlag GmbH Germany, part of Springer Nature. The K–ε model used in turbulence simulations involves the transport equations for the turbulent kinetic energy and its dissipation rate. In contrast to the turbulent energy equation d...
Kazuhiro Inagaki, Fujihiro Hamba
Physical Review Fluids   3    Dec 2018
© 2018 American Physical Society. It is known that turbulent energy is rapidly transferred in the direction of the rotation axis in a rotating system, in comparison with the nonrotating case. In this study, this phenomenon is investigated as a pro...
Fujihiro Hamba
Journal of Fluid Mechanics   842 532-553   May 2018
© 2018 Cambridge University Press. The energy spectrum is commonly used to describe the scale dependence of the turbulent fluctuations in homogeneous isotropic turbulence. In contrast, one-point statistical quantities, such as the turbulent kineti...
Kazuhiro Inagaki, Nobumitsu Yokoi, Fujihiro Hamba
Physical Review Fluids   2    Nov 2017
© 2017 American Physical Society. Recent numerical simulations showed that mean flow is generated in the inhomogeneous turbulence of an incompressible fluid that is accompanied by helicity and system rotation. In order to investigate the mechanism...
H. Miura, F. Hamba, A. Ito
Nuclear Fusion   57    May 2017
© 2017 IAEA, Vienna. A large eddy simulation (LES) approach is introduced to enable the study of the nonlinear growth of ballooning modes in a heliotron-type device, by solving fully 3D two-fluid magnetohydrodynamic (MHD) equations numerically ove...
Fujihiro Hamba
Physics of Fluids   29    Feb 2017
The eddy-viscosity model for turbulence has some difficulty in predicting rotating and swirling flows. Turbulent swirling flow in a straight pipe is a typical example. A rapidly rotating core in the pipe decays too quickly in results obtained from...
Fujihiro Hamba
10th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2017   2    Jan 2017
The energy spectrum must be useful in describing the energy transfer not only in homogeneous isotropic turbulence but also in inhomogeneous turbulence. Instead of the energy spectrum in the wavenumber space, the energy density in the scale space c...
Hideaki Miura, Hideaki Miura, Keisuke Araki, Fujihiro Hamba
Journal of Computational Physics   316 385-395   Jul 2016
© 2016 Elsevier Inc. Effects of the Hall term on short-wave components of magnetohydrodynamic turbulence and sub-grid-scale modeling of the effects are studied. Direct numerical simulations of homogeneous magnetohydrodynamic turbulence with and wi...
N. Yokoi, D. Schmitt, V. Pipin, F. Hamba
Astrophysical Journal   824    Jun 2016
© 2016. The American Astronomical Society. All rights reserved. A new simple dynamo model for stellar activity cycle is proposed. By considering an inhomogeneous flow effect on turbulence, it is shown that turbulent cross helicity (velocity-magnet...
Fujihiro Hamba
Springer Proceedings in Physics   165 33-36   Jan 2016
© Springer International Publishing Switzerland 2016. The energy density in the scale space was introduced on the basis of the two-point velocity correlation toward better understanding inhomogeneous turbulence and improving turbulence models. The...
Fujihiro Hamba
Physics of Fluids   27    Jan 2015
© 2015 AIP Publishing LLC. The energy spectrum contains information not only on the intensity but also on the scale dependence of the turbulent fluctuations; the spectrum is commonly used to describe the dynamics of homogeneous isotropic turbulenc...
Fujihiro Hamba, Kazuhiro Niimura, Yuichi Kitagawa, Kazuyuki Ishii
Physics of Fluids   26    Jan 2014
Mechanical rotation of a magnetic stirrer or a rotary evaporator can induce an enantiomeric excess of supramolecular species. In this study, we investigate the effect of fluid motion in a rotary evaporator on chiral supramolecular species. It is s...
Fujihiro Hamba
Theoretical and Computational Fluid Dynamics   27 651-664   Sep 2013
© Springer-Verlag 2012. Two-equation models that treat the transport equations for two variables are typical models for the Reynolds-averaged Navier-Stokes equation. Compared to the equation for the turbulent kinetic energy, the equation for the s...
Fujihiro Hamba
Physics of Fluids   25    Aug 2013
Two-equation models that treat the transport equations for two variables are typical models for the Reynolds-averaged Navier-Stokes equation. Compared to the equation for the turbulent kinetic energy, the equation for the second variable such as t...
Fujihiro Hamba, Satoshi Abe, Satoshi Abe, Daisuke Kitazawa, Shinsuke Kato
Journal of the Physical Society of Japan   81    Nov 2012
In the reverse simulation for identifying pollutant sources the transport equations for the computational fluid dynamics model are solved backward in time. Some filtering methods are used to suppress the numerical instability of the reverse simula...
Satoshi Abe, Shinsuke Kato, Fujihiro Hamba, Daisuke Kitazawa
Journal of Applied Mathematics   2012    Jun 2012
When a hazardous substance is diffused, it is necessary to identify the pollutant source and respond immediately. However, there are many cases in which damage is caused without a clear understanding of where the pollutant source is located. There...
Satoshi Abe, Shinsuke Kato, Fujihiro Hamba, Daisuke Kitazawa
Journal of Environmental Engineering   77 27-35   Jan 2012
Reverse simulation, which is the solution of the transport equation in negative time, is a method for identifying pollutant source with CFD. Then the negative diffusion amplifies numerical errors and reverse simulation cannot be carried out. We pr...
Daisuke Kitazawa, Satoshi Abe, Fujihiro Hamba, Shinsuke Kato
Proceedings of the International Conference on Offshore Mechanics and Arctic Engineering - OMAE   5 193-199   Dec 2011
Reverse simulation was carried out to specify the point source of pollutants in closed waters. If pollutants flow out into waters, their source must be specified as soon as possible to take a quick measure against the pollution problem. Actually, ...
Fujihiro Hamba
Physics of Fluids   23    Jan 2011
Hybrid Reynolds-averaged Navier-Stokes/large eddy simulation (RANS/LES) is expected to accurately predict wall-bounded turbulent flows at high Reynolds numbers. It is known that extra terms due to the noncommutivity between the hybrid filter and t...
Taketo Ariki, Fujihiro Hamba
Journal of Physics: Conference Series   318    Jan 2011
An analytical way for investigating the inhomogeneous turbulent flow has been proposed by introducing Lagrangian-like view. The present method is developed based on TSDIA (Two-Scale Direct Interaction Approximation) which is one of the few theoret...
Fujihiro Hamba, Masataka Tsuchiya, Masataka Tsuchiya
Physics of Plasmas   17    Feb 2010
A large eddy simulation of magnetohydrodynamic (MHD) turbulent channel flow is carried out to investigate the dynamo mechanism. It is shown that the streamwise component of the mean magnetic field is generated and sustained due to the effect of th...
Fujihiro Hamba
International Journal of Heat and Fluid Flow   30 20-31   Feb 2009
Hybrid approach combining large eddy simulation (LES) with the Reynolds-averaged Navier-Stokes equation (RANS) is expected to accurately simulate wall-bounded turbulent flows at high Reynolds numbers. As an important issue in developing hybrid met...
Fujihiro Hamba
6th International Symposium on Turbulence and Shear Flow Phenomena, TSFP 2009   2009-June 693-698   Jan 2009
© 2009 TSFP4 Symposium. All Rights Reserved. The generation of large-scale magnetic field due to small-scale motion of a conducting fluid, which is called the dynamo action, is important in understanding magnetic fields in astro/geophysical object...
Fujihiro Hamba
Solid Mechanics and its Applications   4 267-272   Dec 2008
An exact nonlocal expression for the Reynolds stress in rotating frames is described using the Green's function for the velocity fluctuation. This expression is applied to the DNS of non-rotating and rotating channel flows. Spatially- and temporal...
Nobumitsu Yokoi, Robert Rubinstein, Akira Yoshizawa, Fujihiro Hamba
Journal of Turbulence   9 1-25   Nov 2008
The statistical theory of inhomogeneous turbulence is applied to develop a system of model equations for magnetohydrodynamic (MHD) turbulence. The statistical descriptors of MHD turbulence are taken to be the turbulent MHD energy, its dissipation ...
Fujihiro Hamba, Hisanori Sato
Physics of Plasmas   15    Mar 2008
The turbulent electromotive force in the mean-field equation needs to be modeled to predict a large-scale magnetic field in magnetohydrodynamic turbulence at high Reynolds number. Using a statistical theory for inhomogeneous turbulence, model expr...
Nobumitsu Yokoi, Fujihiro Hamba
Physics of Plasmas   14    Dec 2007
A magnetohydrodynamic (MHD) turbulence model incorporating the turbulent MHD residual energy (difference between the kinetic and magnetic energies) is applied to solar-wind turbulence. In the model, the dynamics of the turbulent cross-helicity (cr...
Fujihiro Hamba
Journal of Fluid Mechanics   569 399-408   Dec 2006
Taking into account the frame-invariance of a model expression under arbitrarily rotating transformations, Weis & Hutter (J. Fluid Mech. vol. 476, 2003, p. 63) proposed a Euclidean-objective weak-equilibrium condition for the algebraic Reynolds st...
Fujihiro Hamba
Physics of Fluids   18    Dec 2006
In the core region of spanwise rotating channel flows, the mean velocity profile is approximately linear with a slope of twice the system rotation rate. The mechanism of this zero mean absolute vorticity state is investigated from the turbulence m...
Fujihiro Hamba
Theoretical and Computational Fluid Dynamics   20 89-101   Apr 2006
A hybrid method combining large eddy simulation (LES) with the Reynolds-averaged Navier-Stokes (RANS) equation is used to simulate a turbulent channel flow at high Reynolds number. It is known that the mean velocity profile has a mismatch between ...
Fujihiro Hamba
Physics of Fluids   17 1-9   Dec 2005
An exact expression for the Reynolds stress is derived using the response function for the velocity fluctuation. The nonlocal eddy viscosity in the expression represents a contribution to the Reynolds stress by the mean velocity gradient at remote...
Fujihiro Hamba
4th International Symposium on Turbulence and Shear Flow Phenomena   1 147-152   Dec 2005
An exact expression for the Reynolds stress was derived using the Green's function for the velocity fluctuation. The nonlocal eddy viscosity involved in the expression represents a contribution to the Reynolds stress from the mean velocity gradien...
Fujihiro Hamba
Physics of Plasmas   11 5316-5327   Nov 2004
Numerical simulation of the magnetic field in a rotating spherical shell was carried out to assess and improve the Reynolds-averaged turbulence model for magnetohydrodynamic flows. In the three-equation model the transport equations for the turbul...
Fujihiro Hamba
Physics of Fluids   16 1493-1508   May 2004
An exact expression for the scalar flux was derived using the Green's function for a scalar. The nonlocal eddy diffusivity involved in the expression represents a contribution to the scalar flux from the mean scalar gradient at remote points in sp...
Fujihiro Hamba
Theoretical and Computational Fluid Dynamics   16 387-403   May 2003
Hybrid models combining large eddy simulation (LES) with Reynolds-averaged Navier-Stokes (RANS) simulation are expected to be useful for wall modeling in the LES of high Reynolds number flows. Some hybrid simulations of turbulent channel flow have...
Akira Yoshizawa, Hitoshi Fujiwara, Fujihiro Hamba, Shoiti Nisizima, Yukihiro Kumagai
AIAA Journal   41 1029-1036   Jan 2003
A Reynolds mean turbulence model is presented, with attention focused on the applicability to supersonic free-shear layer and wall-bounded flows. In this model, the Reynolds stress is approximated by a nonequilibrium turbulent-viscosity representa...
Fujihiro Hamba
Theoretical and Computational Fluid Dynamics   14 323-336   Dec 2001
Large eddy simulation (LES) is combined with the Reynolds-averaged Navier-Stokes (RANS) equation in a turbulent channel-flow calculation. A one-equation subgrid-scale model is solved in a three-dimensional grid in the near-wall region whereas the ...
Fujihiro Hamba
Journal of the Physical Society of Japan   70 1565-1574   Jun 2001
The non-negativeness of the normal stress is one of the realizability conditions for the Reynolds stress. This condition is investigated to improve turbulence models. A statistical theory called the two-scale direct-interaction approximation is mo...
Fujihiro Hamba
Physics of Fluids   11 1623-1635   Jan 1999
Direct numerical simulation results are used to study compressibility effects on turbulent energy growth in homogeneous shear flow. Normalized amplitude of the pressure fluctuations is shown to decrease as the turbulent Mach number increases. This...
Fujihiro Hamba, Gregory A. Blaisdell
Physics of Fluids   9 2749-2768   Jan 1997
Turbulence models for compressible flows are investigated using a statiscal theory called the two-scale direct-interaction approximation. Inertial-range spectra for velocity and density variances are assumed to derive models for several correlatio...
F. Hamba
Journal of the Atmospheric Sciences   52 1084-1095   Jan 1995
The Green's function for scalar fluctuations is introduced into a large eddy simulation of the convective boundary layer to investigate nonlocal scalar transport. This Green's function is used to derive a nonlocal expression for the scalar flux an...
F. Hamba
Journal of Geophysical Research   98 5173-5182   Jan 1993
The effect of cross diffusion is introduced; that is, the scalar flux of a species depends on the scalar gradients of other species. One-dimensional calculations are carried out for the convective boundary layer by using a K model, a modified K mo...
F. Hamba
Journal of the Atmospheric Sciences   50 2800-2810   Jan 1993
In addition to the eddy diffusivity term, the model includes a term proportional to the second derivative of the mean scalar. The coefficient of the new term is closely related to the skewness of the vertical velocity component and to the inhomoge...
Fujihiro Hamba, Fujihiro Hamba
Physics of Fluids A   4 441-450   Jan 1992
A three-dimensional direct simulation of inhomogeneous magnetohydrodynamic (MHD) turbulence is carried out to investigate the turbulent dynamo effect. The velocity field is driven by an external force so that the velocity and magnetic fields are s...
Fujihiro Hamba, Fujihiro Hamba
Physics of Fluids B   2 3064-3073   Jan 1990
A one-dimensional simulation of reversed field pinches is performed using a turbulent dynamo model. Steady states with field reversal are obtained. Effects of the boundary condition at the wall are investigated to show the importance of injection ...
Fujihiro Hamba
journal of the physical society of japan   58 2414-2422   Jan 1988
A numerical simulation of reversed field pinches is performed using a three-dimensional incompressible magnetohydrodynamic (MHD) code. A turbulence model called large eddy simulation is applied. Although field reversal is obtained in a simulation ...
Fujihiro Hamba
Journal of the Physical Society of Japan   56 3771-3774   Jan 1987
The transport equation for the turbulent energy dissipation rate is investigated using a two-scale direct-interaction approximation. The time integral of a two-time velocity correlation is examined to obtain a statistical model for the dissipation...