title: Molecular-dynamics force models for better control of energy dissipation in numerical simulations of dense granular media.
abstract: We first describe the three-dimensional extension of the molecular-dynamics models for granular media simulations. We then discuss the known energy dissipation problem occurring when simulating dense granular media with the usual molecular-dynamics forces models. We finally propose a force model able to control the energy dissipation in the multiparticle contact situations typical to dense granular media, together with appropriate numerical results.
authors.affiliation: EPFL Swiss Federal Institute of Technology, CH-1015 Lausanne, Switzerland. lionel.pournin@gmx.fr
authors.forename: L
authors.initials: L
authors.lastname: Pournin
authors.forename: Th M
authors.initials: TM
authors.lastname: Liebling
authors.forename: A
authors.initials: A
authors.lastname: Mocellin