Topical Problems of Fluid Mechanics


Institute of Thermomechanics AS CR, v.v.i.	CTU in Prague Faculty of Mech. Engineering Dept. Tech. Mathematics	MIO Université du Sud Toulon Var - AMU - CNRS - IRD	Czech Pilot centre ERCOFTAC

Level Set Representation on Octree for Granular Material with Arbitrary Grain Shape
Duriez J., Galusinsky C.
Abstract:
The Discrete Element Method (DEM) is an efficient tool for modelling granular materials, usually approaching them by spherical particles. Aiming for a better description of grain shapes, the present work first illustrates the Level Set (LS) description of arbitrary surfaces in a DEM extension coined as LS-DEM. LS-DEM logically results in a massive increase in the simulation storage requirements and evaluation time, which is here illustrated with reference to DEM for the ideal case of spherical particles. Then, Level Set Quadtree/Octree data structures are proposed as algorithm improvements to alleviate the computational costs of LS-DEM.
Keywords:
Granular material, Level Set, Octree

Fulltext: PDF DOI: https://doi.org/10.14311/TPFM.2020.009

In Proceedings Topical Problems of Fluid Mechanics 2020, Prague, 2020 Edited by David Šimurda and Tomáš Bodnár, pp. 64-71 ISBN 978-80-87012-74-1 (Print) ISSN 2336-5781 (Print)