Parallel discrete element simulation of poly-dispersed granular material
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- 作者：Rimantas Kač ; ianauskas ; Algirdas Maknickas ; Arnas Kač ; eniauskas ; Darius Markauskas ; Robertas Balevič ; ius
- 关键词：Particle compacting ; Discrete element method ; Poly-dispersed granular material ; Parallel computing ; Spatial domain decomposition ; Distributed memory PC clusters
- 刊名：Advances in Engineering Software
- 出版年：2010
- 出版时间：January 2010
- 年：2010
- 卷：41
- 期：1
- 页码：52-63
- 全文大小：1058 K
文摘
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.