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Parallel Distinct Element Method

Osman Yasargif, Senro Kuraokagif and Peter Bosschergif

Abstract:

The interaction of solid surfaces and granular particles has been studied for over 200 years and yet the fundamental behavior of such interfaces remains undefined. Development of a computational theory and a constitutive law capturing the physics of the interface behavior is the key to advance our understanding. Sophisticated tests have proven the inadequacy of simplistic methods in their representation of the interaction between soil and structural surfaces. We develop a computational theory based on experimentation and the use of distinct element method (DEM) simulations. DEM simulations become computationaly very expensive for particles of more than several thousands. The industrial applications of DEM are many, including lost foam technology in metal casting. A parallel DEM algorithm has been developed for the Intel supercomputers to enhance the number and the complexity of particles and surfaces to be modeled. Preliminary results for 2400 particles are obtained and the parallel efficiency is about 50 % on sixteen nodes. Further study is underway to increase the performance.





Osman Yasar
Wed Jan 22 11:10:46 EST 1997