期刊
ADVANCES IN ENGINEERING SOFTWARE
卷 41, 期 1, 页码 52-63出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.advengsoft.2008.12.004
关键词
Particle compacting; Discrete element method; Poly-dispersed granular material; Parallel computing; Spatial domain decomposition; Distributed memory PC clusters
类别
资金
- FP7 [223807]
The paper presents parallel 3D DEM simulation of poly-dispersed material described by the normal size distribution. Static domain decomposition and message passing inter-processor communication have been implemented in the DEM code. A novel algorithm for moving particles that exchange processors has been incorporated in the domain decomposition framework. Parallel performance of the developed algorithm and software has been investigated by a series of benchmark tests conducting tri-axial compaction of material with different numbers of particles, heterogeneity ratios and compaction durations. The speed-up equal to 8.81 has been obtained on 10 processors of the distributed memory PC cluster. it has been shown that a drastic increase of computational expenses of simulation for the poly-dispersed material in terms of CPU time is associated with the increase of its heterogeneity. A contribution of the temporal evolution of microscopic behaviour has also been illustrated. (C) 2008 Civil-Comp Ltd. and Elsevier Ltd. All rights reserved.
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