TY - GEN
T1 - On the role of correlation between instantaneous velocity and pressure-gradient in large-scale turbulence
AU - Obi, Shinnosuke
PY - 2003/1/1
Y1 - 2003/1/1
N2 - Turbulent transport of Reynolds stress by triple moment of fluctuating velocity and pressure-velocity correlation are evaluated from a DNS for wake of a rectangular cylinder located in a uniform flow. The turbulent diffusion transport of turbulent kinetic energy hardly correlates with its gradient vector, indicating that the generally accepted gradient diffusion model is inadequate. It is inferred that the separate modeling of the individual Reynolds stress component provides a better possibility for modeling the turbulent transport in this flow, because of the strong departure from the equilibrium state of turbulence. The possibility of the direct modeling of the pressure gradient-velocity correlation is discussed.
AB - Turbulent transport of Reynolds stress by triple moment of fluctuating velocity and pressure-velocity correlation are evaluated from a DNS for wake of a rectangular cylinder located in a uniform flow. The turbulent diffusion transport of turbulent kinetic energy hardly correlates with its gradient vector, indicating that the generally accepted gradient diffusion model is inadequate. It is inferred that the separate modeling of the individual Reynolds stress component provides a better possibility for modeling the turbulent transport in this flow, because of the strong departure from the equilibrium state of turbulence. The possibility of the direct modeling of the pressure gradient-velocity correlation is discussed.
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U2 - 10.1115/fedsm2003-45355
DO - 10.1115/fedsm2003-45355
M3 - Conference contribution
AN - SCOPUS:0346904050
SN - 0791836967
SN - 9780791836965
T3 - Proceedings of the ASME/JSME Joint Fluids Engineering Conference
SP - 2059
EP - 2064
BT - Proceedings of the 4th ASME/JSME Joint Fluids Engineering Conference
A2 - Ogut, A.
A2 - Tsuji, Y.
A2 - Kawahashi, M.
PB - American Society of Mechanical Engineers
T2 - 4th ASME/JSME Joint Fluids Engineering Conference
Y2 - 6 July 2003 through 10 July 2003
ER -