Nonlocal effects in sand flows on an inclined plane

F. Malloggi, B. Andreotti, and E. Clément
Phys. Rev. E 91, 052202 – Published 18 May 2015

Abstract

The flow of sand on a rough inclined plane is investigated experimentally. We directly show that a jammed layer of grains spontaneously forms below the avalanche. Its properties and its relation with the rheology of the flowing layer of grains are presented and discussed. In a second part, we study the dynamics of erosion and deposition solitary waves in the domain where they are transversally stable. We characterize their shapes and velocity profiles. We relate their translational velocity to the stopping height and to the mass trapped in the avalanche. Finally, we use the velocity profile to get insight into the rheology very close to the jamming limit.

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  • Received 22 November 2014

DOI:https://doi.org/10.1103/PhysRevE.91.052202

©2015 American Physical Society

Authors & Affiliations

F. Malloggi*, B. Andreotti, and E. Clément

  • Laboratoire de Physique et Mécanique des Milieux Hétérogènes (PMMH), UMR 7636 CNRS–ESPCI–Universités Paris 6 et 7, 10 rue Vauquelin 75231 Paris Cedex 05, France

  • *Present address: LIONS CEA, Saclay, France.

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Vol. 91, Iss. 5 — May 2015

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