FILLING A SILO WITH A MIXTURE OF GRAINS - FRICTION-INDUCED SEGREGATION

We study the filling process of a two-dimensional silo with inelastic particles by simulation of a granular-media, lattice gas (GMLG) model. We calculate the surface shape: and flow profiles for a monodisperse system and we introduce a novel generalization of the GMLG model for a binary mixture of particles of different friction properties where, f or the first time, we measure the segregation process on the surface. The results are in good agreement with a recent theory, and we explain the observed small deviations by the nonuniform velocity profile.