Shape-changing particles for locally resolved particle geometry in DEM simulations  

作　　者：Enric Illana Klidi Qyteti Maik Scharnowski Maximilian Brömmer Siegmar Wirtz Viktor Scherer 

机构地区：[1]Institute of Energy Plant Technology,Ruhr-University Bochum,Bochum,Germany

出　　处：《Particuology》2024年第6期185-190,共6页颗粒学报（英文版）

基　　金：funded by the Deutsche Forschungsgemeinschaft(DFG,German Research Foundation)-Project-ID 422037413-TRR 287;Gefördert durch die Deutsche Forschungsgemeinschaft(DFG)-Projektnummer 422037413-TRR 287.

摘　　要：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 detection algorithms for polyhedral particles. In this short communication, a novel approach that locally resolves 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.

关 键 词：POLYHEDRON Size change Shape change Locally resolved DEM 

分 类 号：O17[理学—数学]