【摘要】 实现了二维非结构化网格上的N-S方程的离散,编制了非结构化同位网格上的SIMPLE程序,针对CFD/NHT 中几个有基准解的问题进行了试算考核。结果表明,在步长基本相同的情况下,四边形网格的收敛速度和解的精度都优于 三角形网格,尤其是收敛速度更明显;使用考虑边界贴体特性的边界层网格,解的精度优于均匀网格。更多还原

【Abstract】 The Navier-Stokes equations are solved on the unstructured quadrilateral grid with the collocated SIMPLE method. With some benchmarked problems, the effects of grid shape on the solution of N-S equations are investigated. It is shown that using quadrilateral meshes the convergence rate and accuracy are much better than using triangular meshes, and using body fitted anisotropic meshes are much better than using uniform meshes.更多还原