Understanding the dynamics of segregation bands of simulated granular material in a rotating drumN. Taberlet1, 2, W. Losert2 and P. Richard1
1 GMCM, Université Rennes 1, UMR 6626 - 35042 Rennes, France
2 IREAP, University of Maryland at College Park - College Park, MD 20742, USA
received 21 June 2004; accepted in final form 15 September 2004
published online 13 October 2004
Axial segregation of a binary mixture of grains in a rotating drum is studied using Molecular Dynamics (MD) simulations. A force scheme leading to a constant restitution coefficient is used and shows that axial segregation is possible between two species of grains made of identical material differing by size. Oscillatory motion of bands is investigated and the influence of the frictional properties elucidated. The mechanism of bands merging is explained using direct imaging of individual grains.
45.70.Mg - Granular flow: mixing, segregation and stratification.
83.10.Mj - Rheology: Molecular dynamics, Brownian dynamics.
© EDP Sciences 2004