一种基于双前沿推进的边界层网格生成算法

Boundary layer mesh generation method based on double-front advancing

高雷诺数粘性流动模拟对边界层内的网格正交性有特殊要求。对于复杂外形,这类问题的网格自动化生成十分困难。面向该问题,提出一种双前沿推进思想,并形成一种面向复杂几何外形的边界层网格全自动生成算法。结合多种网格技术处理局部几何特征以保证边界层网格的质量。双前沿推进思想同时适用于多块结构网格和混合网格的边界层网格生成。多个模型网格实例验证了算法的有效性。

High Reynolds number viscous flow simulation has special requirements on the orthogonality of mesh in boundary layer.For complex geometries,it is very difficult to generate a boundary layer mesh automatically.In this paper,a double-front advancing method is proposed,and an automatic boundary layer mesh generation algorithm for complex geometric shapes is developed.In order to improve the quality of the generated meshes,local geometric features are treated with various techniques.Double-front advancing method is applicable to the generation of boundary layer meshes of multi-block structural meshes and hybrid meshes.The validity of the algorithm is verified by several model examples.