PARALLEL MONTE-CARLO SIMULATION OF 3-DIMENSIONAL FLOW OVER A FLAT-PLATE

被引:10
作者
NANCE, RP
WILMOTH, RG
MOON, B
HASSAN, HA
SALTZ, J
机构
[1] NASA, LANGLEY RES CTR, DIV GAS DYNAM, AEROTHERMODYNAM BRANCH, HAMPTON, VA 23681 USA
[2] UNIV MARYLAND, DEPT COMP SCI, COLLEGE PK, MD 20742 USA
关键词
D O I
10.2514/3.689
中图分类号
O414.1 [热力学];
学科分类号
摘要
This article describes a parallel implementation of the direct simulation Monte Carlo (DSMC) method. Runtime library support is used for scheduling and execution of communication between nodes, and domain decomposition is performed dynamically to maintain a favorable load balance. Performance tests are conducted using the code to evaluate various remapping and remapping-interval policies, and it is shown that a one-dimensional chain-partitioning method works best for the problems considered, The parallel code is then used to simulate the Mach 20 nitrogen now over a finite thickness flat plate. It will be shown that the parallel algorithm produces results that are very similar to previous DSMC results, despite the increased resolution available, However, it yields significantly faster execution times than the scalar code, as well as very good load-balance and scalability characteristics.
引用
收藏
页码:471 / 477
页数:7
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