65000 spheres of different radii moving under the action of gravity. The center of the spheres are constrained to stay in a vertical plane with periodic boundary conditions on the horizontal axis. Colors indicate the speeds.
A generalization of Distinct Element Method to three-dimensional particles with complex shapes Thematic meeting on discrete simulations Institut Henri Poincaré, Paris, March 16-18, 2005
Molecular-dynamics force models for better control of energy dissipation in numerical simulations of dense granular media Workshop on the Quasi-Static Deformations of Particulate Materials - QuaDPM'03 Budapest, August 25-28, 2003