A Hydrodynamic model for a dynamical jammed-to-flowing transition in gravity driven granular media

Details A Hydrodynamic model for a dynamical jammed-to-flowing transition in gravity driven granular media A Hydrodynamic model for a dynamical jammed-to-flowing transition in gravity driven granular media

2001-12-05

arxiv.org/abs/cond-mat/0112072v1

Physical Review Letters 89, 184301(2002)

Physics

Condensed Matter

Statistical Mechanics

Scientific paper

10.1103/PhysRevLett.89.184301

Granular material on an inclined plane will flow like a fluid if the angle $\theta$ the plane makes with the horizontal is large enough. We employ a modification of a hydrodynamic model introduced previously to describe Couette flow experiments to describe chute flow down a plane. In this geometry, our model predicts a jammed-to-flowing transition as $\theta$ is increased even though it does not include solid friction, which might seem necessary to stabilize a state without flow. The transition is driven by coupling between mean and fluctuating velocity. In agreement with experiments and simulations, it predicts flow for layers with a thickness H larger than a critical value $H_{\rm stop}(\theta)$ and absence of flow for $H

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