Microscopic Model for Granular Stratification and Segregation

Abstract

We study segregation and stratification of mixtures of grains differing in size, shape and material properties poured in two-dimensional silos using a microscopic lattice model for surface flows of grains. The model incorporates the dissipation of energy in collisions between rolling and static grains and an energy barrier describing the geometrical asperities of the grains. We study the phase diagram of the different morphologies predicted by the model as a function of the two parameters. We find regions of segregation and stratification, in agreement with experimental finding, as well as a region of total mixing.

4 pages, 7 figures, http://polymer.bu.edu/~hmakse/Home.html

References in corpus (3)

• Spontaneous Stratification in Granular Mixtures
• Possible Stratification Mechanism in Granular Mixtures
• Stratification Instability in Granular Flows

Cited by in corpus (6)

• Spontaneous Stratification in Granular Mixtures
• Dynamics of Granular Stratification
• Mechanisms of Granular Spontaneous Stratification and Segregation in Two-Dimensional Silos
• How sandpiles spill: Sandpile problem in a thick flow regime
• Efficient numerical simulation of granular matter using the Bottom-To-Top Reconstruction method
• Evolution of a sandpile in a thick flow regime