Abstract:
A novel hybrid mesh generation algorithm for two-dimensional viscous flow computation is proposed. This algorithm includes two interrelated procedures for boundary layer mesh generation and unstructured mesh generation. The reducing march directions at concave corners and adding march directions at convex corners improve the quality and orthogonality of the mesh. The degrading quality of unstructured elements due to the movement of boundary layer fronts can be improved to an acceptable level by using a mesh coarsen scheme. Mesh examples are presented to demonstrate that the algorithm can guarantee the quality of non structure grid cell, and satisfy the needs of practical analysis.
Key words:
mesh generation,
hybrid mesh,
viscous flow computation,
quality optimization,
mesh coarsen
摘要： 针对粘性绕流计算，研究一类边界层网格和非结构网格同时生成的混合网格生成算法。在计算域内生成非结构网格，向内部移动非结构网格，空出的空间填充边界层网格。采用在凸角点处增加或在凹角点处合并推进方向，提高了边界层网格质量及正交性。提出结合粗化网格算法的优化策略，优化非结构网格。网格实例结果表明，该算法可保证非结构网格单元的质量，满足实际分析的需要。
关键词:
网格生成,
混合网格,
粘性绕流计算,
质量优化,
网格粗化
CLC Number: