结合前沿推进的Delaunay三角化网格生成及应用

Delaunay Triangulation for Internal Node Generation in Frontal Approach and Application

采用一种新的混合网格生成方法,生成复杂区域的非结构化网格.结合前沿推进法和Delaunay三角化两种非结构网格生成方法的特点,在边界处采用前沿推进法进行三角形初始网格的生成,在边界区域内部采用Delaunay三角化方法自动生成内部节点.分析表明,该算法简化网格生成过程,能够快速有效地生成非结构化网格.在计算时间以及网格的均匀性方面与其他方法相比具有一定的优势.最后,用混合网格生成方法生成方柱绕流的计算域网格,并运用基于特征线方程的分离算法进行流场计算.

A mixed unstructured mesh generation method is proposed for complicated computational domains. Delaunay triangulation is applied based on initial meshes generated by frontal approach. It indicates that the mixed method shows good geometrical features and high efficiency. Characteristic based split scheme is applied to flows around a square cylinder in a channel with unstructured meshes generated by mixed method.