基于非结构网格求解换热器流场的并行计算

该文利用基于非结构化网格的有限容积方法，对两种典型结构换热器内的冷态流场进行了数值模拟，分别给出了换热器内管组对齐排列和交错排列时的流体速度场、压力场和湍动能分布，并对这两种不同管组布置结构的流场进行了比较和分析。其中，采用Delaunay三角化方法在多连通区域内生成非结构化网格，并采用SIMPLE算法离散流动问题的控制微分方程，由此形成的线性代数方程组中的稀疏矩阵则通过并行化的GMRES算法在PC机群上进行多机并行求解，且并行编程环境为基于PC网络分布式内存模式的MPI。实际应用表明：基于网络并行的GMRES算法能获得较高的加速比和效率。

Parallel computation of fluid flow in heat exchanger based on unstructured grid

In this paper, numerical simulations of fluid flows in two typical heat exchangers are carried out by using finite volume method with unstructured grid. The computational results of velocity, pressure and turbulent kinetic energy for both types of heat exchangers are discussed. In the numerical procedure, the unstructured meshes are generated in multiply connected domains by Delaunay Triangularization Method, the governing equations are discretized by the SIMPLE Algorithm, and the sparse matrices are solved by a parallel GMRES Algorithm based on a PC network with MPI. The practical applications show that high speedup ratio and efficiency can be achieved by the network-based parallel GMRES procedure.