Random packing of tetrahedral particles using the polyhedral and multi-sphere discrete element method

Abstract

Two particle models, a multi-sphere model and a polyhedron model, are used to generate complex particle shapes for three dimensional discrete element method simulations. A general contact force law for arbitrarily shaped particles is developed. The effect of the resolution of the particle on an individual particle’s movement is investigated. A series of simulations of random packing of noncohesive, monodisperse regular tetrahedral particles is carried out. The effect of the particle resolution on the packing heights and mean coordination numbers of the assemblies is examined. It is demonstrated that the resolution of the particle has a significant effect on packing characteristics. The multi-sphere model with limited component spheres is not superior to modeling angular particles with sharp edges.