汽车外部流场仿真的复杂网格系统生成

生成高质量的流场计算网格，对于提高汽车外部流场仿真的效率和精度具有重要意义，是汽车外部流场仿真计算的主要难点之一，针对汽车外部流场仿真求解域大，汽车几何形状复杂的特点，根据汽车外部流场结构和求解要求，将整个求解域分区，分别生成结构/非结构网格系统。在汽车壁面采用半结构化网格，沿壁面法线方向进行加密，以满足汽车壁面粘性边界层计算要求。

Grid Generation for CFD Simulation of Vehicle Aerodynamics

Grid generation is one of main difficulties in flow simulation around a car and is important for improving efficiency and precision of simulation. In view of the huge domain of solution and complexity of geometry, this paper brings forward a new model according to the structure of car's flow field and the features of solution. The model divides the whole domain into two sub-domains and generates structured/ unstructured mesh respectively in different domain.While on the surface of the vehicle,semi-structured mesh is adopted to meet the special requirements of computation for viscous boundary layer.