CGNS API和FVM在非结构混合网格计算中的应用

用CGNS API（CFD General Notation System Application Programming Interface）作为非结构混合网格求解器的前处理和后处理，用FVM（Finite Volume Method）作为偏微分方程求解方法．在前处理过程中，用hash表法对内部网格面和边界网格面进行编号，并计算出相应的几何信息，以满足FVM求解器的需要．从FVM求解器计算出来的各种场信息可以写入原来的CGNS文件，该文件可以被许多专业商业后处理软件（如Tecplot，Fluent，CFX等）读取和进行可视化；对于求解器，用基于网格中心的FVM及SIMPLEC（Semi Implicit Methodfor Pressure Linked Equation Consistent）方法求解压力速度耦合．最后给出两个说明算例．

CGNS API and FVM in Unstructured Hybrid Grid Computational Method

An unstructured hybrid grid computational method is proposed,in which CGNS API(CFD General Notation System Application Programming Interface) is taken as pre and post-processing and FVM(Finite Volume Method) is taken as a PDE(Partial Differential Equation) solver.In the pre-processing,the interior mesh faces and boundary mesh faces are indexed with hash table method for the requirment of the FVM solver.The results of the solver are written into original CGNS files with which the post-processing is dealt with by post-processing softwares,such as tecplot,fluent and CFX.For the solver,a cell centered FVM is applied to solve the coupled pressure and velocities with the SIMPLEC(Semi Implicit Method for Pressure Linked Equation Consistent).Two numerical examples are shown.