摘要
通过对非结构化网格生成的阵面推进方法进行分析,对该算法进行了优化设计,采用笛卡尔直角坐标网格来代替背景非结构化网格,其上网格尺度参数通过控制体有限元法求解Possion方程的Dirchlet问题得到,提高了网格生成的效率和质量。同时利用Laplacian滤波算子和对角交换方法来改善三角形网格的质量,尤其是对角交换技术对消除畸形三角形单元效果明显。对固壁边界采用三次样条拟合后重新离散的方式形成初始阵面,改进了网格的贴体性,提高了网格的光滑性。在编制通用程序时利用链表结构和派生类型的数据变量,节省了计算内存,提高了网格生成效率。
According to the analysis of the advancing front method for the generation of unstructured grid, this paper put forward an efficient algorithm by optimization, adopt to structured background grid replacing unstructured background grid, and the scale of grid is gained through making use of control volume finite element to solve Possion function with the Dirchlet boundary condition. This paper introduces the Laplacian operator and the technology of exchanging of opposite angle to improve the quality of grid. At the time of programming, the dynamic data structure of link list and the new data type are used to speed up the process of grid generation.
出处
《航空计算技术》
2003年第1期26-28,32,共4页
Aeronautical Computing Technique
