Theoretical Investigation of an Eddy-Viscosity-Type Representation of the Reynolds Stress
Theoretical Investigation of an Eddy-Viscosity-Type Representation of the Reynolds Stress
复制标题
雷诺应力涡粘式表示的理论研究
DOI：
10.1143/jpsj.63.2102
复制
发表时间：
1994
影响因子：
1.7
通讯作者：
M. Okamoto
中科院分区：
文献类型：
--
作者：
M. Okamoto
本文借助于双尺度直接相互作用近似（TSDIA），研究了雷诺应力的涡粘性型表示。TSDIA的二阶和三阶分析适用于雷诺应力。利用这些结果，雷诺应力的非线性部分和湍流能量耗散率方程进行了详细讨论。非线性部分除了考虑简单的涡粘性效应外，还考虑了湍流的非平衡效应。进一步，利用实验数据，我们证实了非平衡性质对K-e模型的改进。
An eddy-viscosity-type representation of the Reynolds stress is investigated with the aid of a two-scale direct-interaction approximation (TSDIA). The second- and third-order analyses of the TSDIA are applied to the Reynolds stress. Using these results, the nonlinear part of the Reynolds stress and the turbulent-energy dissipation rate equation are discussed in detail. Non-equilibrium effects of turbulence are also incorporated into the nonlinear part in addition to the simple eddy-viscosity one. Further, using the experimental data, we confirm that the K- e model is improved by the non-equilibrium property.