面向计算流体动力学的三棱柱网格生成方法

A Method of Generating Prismatic Grids for Computational Fluid Dynamics

现有三棱柱网格的生成方法因不能避免负体积现象,从而使计算流体动力学（CFD）仿真分析失败,为此,提出三棱柱CFD网格生成方法,将三角形物面网格分为多个特征域与辅助域,创建特征框架与辅助框架以及域网格点的参数化模型,生成满意拉伸比的边界层三棱柱网格,避免了四面体在边界层网格填充效率不高的缺点。多个应用实例表明文中方法的正确有效,故有实用价值。

A method of generating prismatic grids for computational fluid dynamics（CFD）, is presented to avoid terminating CFDcalculation caused by prismatic grids of negative volume. In this method, a triangle mesh model is divided into several featureshells and assistant shells, on which the corresponding feature frames assistant frames and parameterization of these shells isconstructed, to produce desire prismatic grids and get higher filling rate compared to tetrahedral grids. This method is verified bysome engineering cases, which shows it is useful.