结构化与非结构化网格中的导热计算

Conduction Heat Transfer Calculations by Structured and Unstructured Grids

用基元有限容积方法求解热传导问题,同时采用结构化网格和非结构化网格,并和精确解相比较.虽然从两种网格形式,都能得到满意的结果,但结构化网格较三角形非结构化网格在规则区域更精确一些.为了提高非结构化网格的精度,二次扩散项是十分重要的.

Conduction heat transfer problems are solved using a cell-based finite volume method. Solutions are obtained by using structured and unstructured grids. Some of the results are compared with exact solutions. Although both the structured and unstructured meshes produce accurate solutions, the structured grid solutions are more accurate than the triangular unstructured grid. The secondary diffusion term is important if accurate solutions are to be obtained from unstructured grid in rectangular region.