首页|Shape-changing particles for locally resolved particle geometry in DEM simulations
Shape-changing particles for locally resolved particle geometry in DEM simulations
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Taking into account the complex shape of particles in discrete element method(DEM)simulations of large-scale granular systems is computationally demanding due to the time-consuming contact detec-tion algorithms for polyhedral particles.In this short communication,a novel approach that locally re-solves the particle shapes where needed and uses a simplified representation elsewhere,to accelerate simulations without compromising accuracy,is presented.For this purpose,a method employing a smooth transition of the particle shape representation from analytical spheres to shape-resolving polyhedra is introduced in DEM.The feasibility and correct implementation of this approach are demonstrated through simulations of hopper discharge involving spherical and dodecahedral particles from a flat bottom silo or shaft kiln.The model capabilities,in terms of accuracy as well as reduction in computational effort,are quantified for a moving bed with continuous outflow.
NETL
NSTL
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