| 摘要: |
| 为研究极端条件下金属材料的性质,在JASMIN 框架上研制了三维并行位错动力学程序PDD3D. 它集成了离散位错动力学模拟的物理方案和数值算法.通过设计实现高效的分布式数据结构、可扩展的快速多极子解法器以及基于影像区的拓扑操作通信方式,该程序具有较高的性能和较好的可扩展性.1024 个处理器上,对包含3 千万条位错线的物理模型的模拟结果显示,PDD3D 程序获得了81%的并行效率. |
| 关键词: 并行计算 位错动力学 粒子模拟 快速多极子 JASMIN 框架 |
| DOI： |
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| 基金项目:Supported by the National High-Tech Research and Development Plan of China under Grant No.2010AA012300 (国家高技术研究发展计划(863)); the National Basic Research Program of China under Grant No.2011CB309702 (国家重点基础研究发展规划(973)); the
National Natural Science Foundation of China under Grant No.61033009 (国家自然科学基金) |
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| Parallel Algorithm and Software of Three-Dimensional Dislocation Dynamics |
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LIU Xu, CAO Xiao-Lin, ZHANG Guang-Cai, SHEN Wei-Chao, WU Guo-Qing
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Institute of Applied Physics and Computational Mathematics, Beijing 100094, China
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| Abstract: |
| To study the properties of metal under extreme conditions, a parallel program for 3-dimensional dislocation dynamics (PDD3D) is developed based on JASMIN. By integrating effective distributed data structures, a scalable fast multi-pole method solver and a novel communication scheme based on ghost, PDD3D achieves good parallel scalability. In a simulation of a model containing 30 million dislocation segments, the parallel efficiency of PDD3D of 1024 CPUs relative to 128 CPUs is 81%. |
| Key words: parallel computing dislocation dynamics particle simulation fast multi-pole method JASMIN |
