非结构网格生成技术方法研究

利用点源或线源所影响的势函数分布规律，通过建立势函数与网格背景信息之间的关系，提供非结构网格生成过程中所需的网格背景参数;在物体边界节点已知的情况下，适当布置点源和线源个数，用最小二乘法确定各点源和线源的强度;通过对部分点源或线源的影响势函数施加方向控制开关，使所生成的网格在期望的区域得到加密;算例表明本文方法是一种有效、快速的处理方法，与传统用背景网格提供背景信息的方法相比，在计算量、程序量、光滑性和灵活性方面都能表现出良好的性质。

The Method Investigation in Unstructured Grid Generation Technique

The potential induced by a few sources and sinks is used in present paper to control the grid stretching in unstructured grid generation. After the inter and outer boundaries are divided into the expected elements and a certain number of point sources and line sources are distributed in the field, the strengths of the sources are determined by the least-square method so that the potential distribution on the inter boundary is inversely proportional to the element size.Then, the potential induced by the sources is used to supply with the background information needed in Advancing Front method. The grids around different complex configurations are generated by present method, and the method is shown to be effective and efficient.