TK-2DC软件前处理模块-贴体正交网格生成软件开发

贴体正交网格计算方法是通过坐标变换或坐标投影,把不规则物理区域进行离散以生成规则矩形计算区域的方法,所生成网格的疏密性和正交性对于保证数值计算精度至关重要。目前最常用的3种贴体正交网格计算方法是代数网格生成法、椭圆型方程网格生成法以及保角变换网格生成法。为了保证网格的正交性,简化网格计算量,所采用的贴体正交网格计算方法是上述3种方法的组合体,并且以该法为内核,开发了简单易学的贴体正交网格可视化计算软件,该软件可以与CAD进行无缝连接,大大缩短了数值模拟前期研究工作的时间。

Generation of orthogonal body-fitted meshes and software development

The generation algorithm of orthogonal curved body-fitted grids is the methods to transform the physical domain with curved boundaries into rectangular computational domains,in which the density and orthogonality of grid are very important for the precision of the numerical simulation.The mostly used methods for generating orthogonal curved body-fitted grids are algebraic grid generation,elliptic grid generation and conformal mapping grid generation.In order to ensure the orthogonality of grids and simplify the amount of computation,a new method based on algebraic grid generation,elliptic grid generation and conformal mapping grid generation is proposed in this paper.Based on this method,a new visualized software was developed for orthogonal curved grid generation,which can be completely connected with the CAD,and the time for preliminary work of the numerical simulation has been greatly shortened.