分区迭代计算流动问题中重叠边界的处理  

Numerical Methods in Solving the Combined Boundary Problem Emerging in Analyzing the Drive Flow Using the Parallel Computing

作　　者：李峥[1] 杨茉[1] 王治云[1] 朱超[1] 

机构地区：[1]上海理工大学,能源与动力工程学院,上海200093

出　　处：《工程热物理学报》2011年第12期2110-2113,共4页Journal of Engineering Thermophysics

基　　金：国家自然科学基金(No.50876067);上海教委科研创新重点项目(No.10ZZ91);上海市重点学科建设项目(No.J50501)

摘　　要：本文首先采用四种重叠边界的处理方法,对顶盖驱动流动问题进行了分区迭代并行计算,探讨分区迭代并行计算流动问题时重叠边界处理方法对计算时间和计算精度的影响。计算结果表明,当采用一个网格重叠迭代计算时,计算结果具有明显的误差;多个网格重叠计算精度较高,但重复的计算量很大,失去了并行计算提高计算速度的意义;而采用无网格重叠与两个网格重叠,计算精度较高,且计算量很小。进而针对无网格重叠与两个网格重叠的方式提出垂直方向交替失代与全区域附加迭代法进一步提高其计算精度,计算结果表明两种方法均可显著提高精度,但垂直方向交替迭代对并行效率影响较大,而全区域附加迭代法对并行效率基本没有影响,更具应用价值。Four grid design methods for parallel computing are used to solve the drive flow. And the computational accuracy and parallel efficiency are compared to find which is suitable for this kind of problems. Then the numerical results show that none addition grid method and two addition grids are accepted since their computational accuracy and parallel efficiency both are high enough while one addition grid method has the poorest computational accuracy and half computational domain addition grids method has the lowest parallel efficiency. Furthermore, because the two accepted methods still have computational errors, perpendicular addition iterations revise and whole area addition iterations revise are advanced to correct them. And the solution shows that these revises can both increase the accuracy, but only the second one is accepted, because the first one has a significant effect on the parallel efficiency.

关 键 词：数值模拟 顶盖驱动流 并行计算 

分 类 号：TK124[动力工程及工程热物理—工程热物理]