Determination of contact parameters for discrete element method simulations of granular systems--颗粒学报PARTICUOLOGY

Malone, K. F., & Xu, B. H. (2008). Determination of contact parameters for discrete element method simulations of granular systems. Particuology, 6(6), 521–528. https://doi.org/10.1016/j.partic.2008.07.012

Determination of contact parameters for discrete element method simulations of granular systems

Kevin Francis Malone, Bao Hua Xu^*

Institute of Particle Science and Engineering, University of Leeds, Leeds LS2 9JT, UK

10.1016/j.partic.2008.07.012

Volume 6, Issue 6, December 2008, Pages 521-528

Received 3 May 2008, Accepted 15 July 2008, Available online 18 November 2008.

E-mail: b.h.xu@leeds.ac.uk

Highlights

Abstract

Both linear-spring–dashpot (LSD) and non-linear Hertzian-spring–dashpot (HSD) contact models are commonly used for the calculation of contact forces in Discrete Element Method (DEM) simulations of granular systems. Despite the popularity of these models, determination of suitable values for the contact parameters of the simulated particles such as stiffness, damping coefficient, coefficient of restitution, and simulation time step, is not altogether obvious. In this work the relationships between these contact parameters for a model system where a particle impacts on a flat base are examined. Recommendations are made concerning the determination of these contact parameters for use in DEM simulations.

Graphical abstract

Keywords

Discrete Element Method (DEM); Linear-spring–dashpot model; Non-linear Hertzian-spring–dashpot model; Contact parameters

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