SI MPLE算法的一个新的改进方案

New Improvement of the SIMPLE Algorithm

提出了SIMPLE算法的一个新的改进方案———MSIMPLE .该方案采用SIMPLEC中的方法对速度修正方程进行处理 ,同时对压力场的确定采用SIMPLER中的方法来完成 .通过对 2个典型的流动传热问题 (圆管突扩通道内的流动、正方形空腔内的自然对流 )的计算 ,将该改进方案与SIMPLE、SIMPLEC、SEMPLER算法进行了初步对比 .结果表明 ,改进方案有着更好的收敛特性 ,并且能节省数值计算的计算时间 .

A new improvement of the SIMPLE algorithm has been proposed. In this improved algorithm (MSIMPLE), consistency of velocity correction equation was considered by using the method adopted in the SIMPLEC algorithm, while the pressure field was determined by the way adopted in the SIMPLER algorithm. Comparisons between MSIMPLE and SIMPLE, SIMPLEC, SIMPLER algorithms were conducted by calculating two typical flow and heat transfer problems (flow in a two dimensional axisymmetric sudden expansion, natural convection in a square cavity). The results of comparison indicated that the new algorithm has better convergence characteristics and can speed up the solution procedure.