C223 圧縮性一様剪断乱流と 3 方程式モデル

概要

論文の詳細を見る
A three-equation model for compressible turbulence is proposed by extending the incompressible K-ε model to the compressible case. In addition to the turbulent kinetic energy and its dissipation rate the pressure variance is adopted as the third model variable to express the compressibility effect. Direct numerical simulation of homogeneous shear flow is performed using various initial values of the turbulent Mach number. Model expressions are improved and model constants are optimized using results of the direct numerical simulation. The model equation is solved to obtain the time development of mean quantities such as the mean pressure and the turbulent kinetic energy. It is shown that the model can reproduce the reduced growth rate of turbulent energy due to compressibility effect.
日本流体力学会の論文
2000-07-25