B331 修正型壁面モデルを適用した LES による静止直円管内旋回乱流の数値解析

概要

論文の詳細を見る
The differential equations model of wall stress models have been proposed to reduce the CPU time required in LES and to predict with a good accuracy. We improved the 0 equation model of the turbulent eddy viscosity in the differential equations model using the gradient Richardson number. In this model we calculated the turbulent swirling flow in a stationary straight pipe. The improved model predicted the axial and tangential mean velocity and three turbulent intensities and Reynolds shear stresses with a good accuracy. The CPU time of this model is not more than 50% of that of LES with the no-slip boundary condition at the wall. The improved model predicted the axial and tangential wall shear stresses more precisely than the no-improved model.
日本流体力学会の論文
2001-07-31