动网格技术数值模拟挑流冲刷过程

Numerical modeling of the scouring process of free jet using moving grids

实际挑流泄洪消能时冲坑及堆丘的形成是一动态过程。已有对挑流冲刷的数值模拟多考虑平衡冲刷坑情况。本文采用动网格技术模拟挑流冲刷时因河床边界变化引起的流场变化过程 ,控制方程组由非正交同位网格有限体积法求解。计算结果表明 ,本文方法是有效的 ,正确地反映了挑流冲刷过程中流场结构及速度、压力等参数的变化。

WT5”BZ]The topography of riverbed under scouring changes in a dynamic manner in practice; most numerical modeling presented only dealt with the water flows in equilibrium scour pool. In this paper, dynamic process was treated with moving grids, and the governing equations were solved using the finite volume method with colocated variable arrangements on boundary fitted non orthogonal grids. The results show that the given method is efficient, with which the variation of flow parameters, such as mean velocity and mean pressure, etc., can be analyzed correctly. [WT5HZ]