Simulation of rotating drum experiments using non-circular particles
  We investigate the flow of granular material in a rotating cylinder numerically using molecular dynamics in two dimensions. The particles are described by a new model which allows to simulate geometrically complicated shaped grains. The results of the simulation agree significantly better with experiments than the results which are based on circular particles. 
Volkhard Buchholtz, Thorsten Poeschel, and Hans-Juergen Tillemans