Parallel discrete element simulation of poly-dispersed granular material

R Kacianauskas and A Maknickas and A Kaceniauskas and D Markauskas and R Balevicius, ADVANCES IN ENGINEERING SOFTWARE, 41, 52-63 (2010).

DOI: 10.1016/j.advengsoft.2008.12.004

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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