Theoretical Investigation of an Eddy-Viscosity-Type Expression of the Reynolds Stress with Low-Reynolds-Number Effect |
| |
Authors: | Masayoshi Okamoto Nobuyuki Shima |
| |
Institution: | (1) Department of Mechanical Engineering, Shizuoka University, Hamamatsu 432-8561, Japan tmmokam@ipc.shizuoka.ac.jp, JP;(2) Department of Mechanical Engineering, Shizuoka University, Hamamatsu 432-8561, Japan tmnshim@ipc.shizuoka.ac.jp, JP |
| |
Abstract: | In low-Reynolds-number turbulent flows, the influence of the molecular viscosity is important. The turbulence models which
are applied to those flows should include the low-Reynolds-number effect. In this study, turbulent flow with the molecular
viscosity effect is analyzed theoretically with the aid of a two-scale direct-interaction approximation (TSDIA) and the energy
spectrum and a new low-Reynolds-number-type eddy-viscosity representation are derived. An priori test for the model expression on the basis of the result of direct numerical simulation (DNS) for turbulent Couette flows
is performed.
Received 5 July 2002 and accepted 8 January 2003 Published online 25 March 2003
Communicated by T.B. Gatski |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|