Europhys. Lett.
Volume 76, Number 3, November 2006
Page(s) 360 - 366
Section General
Published online 07 October 2006
Europhys. Lett., 76 (3), pp. 360-366 (2006)
DOI: 10.1209/epl/i2006-10286-2

Simulations of collision times in gravity-driven granular flow

J. J. Drozd and C. Denniston

Department of Applied Mathematics, The University of Western Ontario London, Ontario N6A 5B8, Canada

received 25 May 2006; accepted in final form 11 September 2006
published online 7 October 2006

We use simulations to investigate collision time distributions as one approaches the static limit of steady-state flow of dry granular matter. The collision times fall in a power law distribution with an exponent dictated by whether the grains are ordered or disordered. Remarkably, the exponents have almost no dependence on dimension. We are also able to resolve a disagreement between simulation and experiments on the exponent of the collision time power law distribution.

05.20.Dd - Classical statistical mechanics: Kinetic theory.
45.70.Mg - Classical mechanics of discrete systems: Granular flow; mixing, segregation and stratification.
83.80.Fg - Rheology: Granular solids.

© EDP Sciences 2006