Volume 44, Number 3, November I 1998
|Page(s)||386 - 392|
|Section||Cross-disciplinary physics and related areas of science and technology|
|Published online||01 September 2002|
Filling a silo with a mixture of grains: Friction-induced segregation
Department of Theoretical Physics, Technical University of Budapest, Budafoki u. 8, 1111 Hungary
2 Theoretische Physik, FB 10, Gerhard-Mercator Universität - 47048 Duisburg, Germany
3 Center for Polymer Studies and Physics Department, Boston University, Boston, MA 02215, USA
4 Minerva Center and Department of Physics, Bar-Ilan University - Ramat Gan, Israel
5 Schlumberger-Doll Research, Old Quarry Road - Ridgefield, CT 06877, USA
Accepted: 10 September 1998
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, for 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.
PACS: 83.70.Fn – Granular solids / 64.75.+g – Solubility, segregation, and mixing; phase separation / 46.10.+z – Mechanics of discrete systems
© EDP Sciences, 1998
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