Possible Stratification Mechanism in Granular Mixtures
Statistical Mechanics
2009-10-31 v1
Abstract
We propose a mechanism to explain what occurs when a mixture of grains of different sizes and different shapes (i.e. different repose angles) is poured into a quasi-two-dimensional cell. Specifically, we develop a model that displays spontaneous stratification of the large and small grains in alternating layers. We find that the key requirement for stratification is a difference in the repose angles of the two pure species, a prediction confirmed by experimental findings. We also identify a kink mechanism that appears to describe essential aspects of the dynamics of stratification.
Cite
@article{arxiv.cond-mat/9809420,
title = {Possible Stratification Mechanism in Granular Mixtures},
author = {Hernan A. Makse and Pierre Cizeau and H. Eugene Stanley},
journal= {arXiv preprint arXiv:cond-mat/9809420},
year = {2009}
}
Comments
4 pages, 4 figures, http://polymer.bu.edu/~hmakse/Home.html