Parallel DEM Software for Simulation of Granular Media

The paper describes the development and performance of parallel algorithms for the discrete element method (DEM) software. Spatial domain decomposition strategy and message passing inter-processor communication have been implemented in the DEMMAT code for simulation of visco-elastic frictional granular media. The novel algorithm combining link-cells for contact detection, the static domain decomposition for parallelization and MPI data transfer for processors exchanging particles has been developed for distributed memory PC clusters. The parallel software DEMMAT_PAR has been applied to model compacting of spherical particles in the rectangular box. Two benchmark problems with different numbers of particles have been solved in order to measure parallel efficiency of the code. The inter-processor communication has been examined in order to improve domain decomposition topology and to achieve better load balancing. The speed-up equal to 11 has been obtained on 16 processors. The parallel ...

• Type: Journal
• Year: 2006
• Where: INFORMATICALT
• Authors: Algirdas Maknickas, Arnas Kaceniauskas, Rimantas Kacianauskas, Robertas Balevicius, Algis Dziugys
• Keywords: Discrete Element Method, Domain Decomposition, INFORMATICALT 2006, Spatial Domain Decomposition