基于非结构网格的不可压流动耦合求解器  

A Coupled Incompressible Flow Solver on Unstructured Grids

作　　者：王辉[1] 徐明海[1] 

机构地区：[1]中国石油大学(华东)储运与建筑工程学院,山东青岛266555

出　　处：《工程热物理学报》2012年第3期460-464,共5页Journal of Engineering Thermophysics

基　　金：中央高校基本科研业务费专项资金资助项目(No.10CX05011A)

摘　　要：采用非结构化网格有限容积法求解了不可压N-S方程组,对流项采用GAMMA格式,扩散项采用二阶中心差分格式建立离散方程,用SOAR算法处理压力与速度的耦合关系,得到了一种求解不可压N-S方程的非结构网格耦合求解器。通过方腔顶盖驱动流、后台阶绕流以及方腔自然对流等几个典型的算例,考察了求解器的计算精度及收敛特性,并与SIMPLE算法进行了比较,结果表明该求解器是有效可行的。The finite volume method based on the unstructured collocated meshes is applied to solve incompressible N-S equations.The convective flux is evaluated using the GAMMA scheme with deferred correction.The diffusive flux is computed using central difference scheme.The SOAR algorithm is adopted to deal with the coupling relationship of pressure and velocity.A coupled incompressible flow solver on unstructured grids is thus derived.As test cases,the lid-drive flow, backward-facing step flow and natural convection in a closed square cavity were carried out to exam the accuracy and convergence of the new solver,and the iteration parameters were compared with those from SIMPLE algorithm,and the result shows that the present solver is affective and feasible.

关 键 词：非结构化网格 不可压N-S方程 耦合求解器 有限容积法 

分 类 号：TK124[动力工程及工程热物理—工程热物理]