Rheology of confined granular flows

Journal Article · Wed May 05 00:00:00 EDT 2010 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3435423· OSTI ID:21367315

Richard, Patrick; Valance, Alexandre; Metayer, Jean-Francois; Crassous, Jerome; Delannay, Renaud ^[1]; Louge, Michel ^[2]

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1. Universite Rennes 1, Institut de Physique de Rennes, UMR CNRS 6251, 263 av. General Leclerc, 35042 Rennes cedex FRANCE (France)
2. Sibley School of Mechanical and Aerospace Engineering, Cornell University, Ithaca, NY 14853 (United States)

The properties of confined granular flows on a heap are studied through numerical simulations and experiments. We address how such system can be simulated with period boundaries in the flow direction. The packing fraction and velocity profiles are found to be described by one length scale. The dependence of the kinematic properties on the number of grains and on micromechanical parameters (coefficient of restitution and coefficient of friction) is described. Our results show that the friction at the sidewalls gradually decreases and that this decrease can be explained by the intermittent motion of the grains in the quasistatic part of the flow.

• OSTI ID: 21367315
• Journal Information: AIP Conference Proceedings, Vol. 1227, Issue 1; Conference: IUTAM-ISIMM symposium on mathematical modeling and physical instances of granular flows, Reggio Calabria (Italy), 14-18 Sep 2009; Other Information: DOI: 10.1063/1.3435423; (c) 2010 American Institute of Physics; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
COMPUTERIZED SIMULATION
FRICTION
GRANULAR MATERIALS
LENGTH
RHEOLOGY
SOLIDS FLOW
STRESS ANALYSIS
VELOCITY
DIMENSIONS
FLUID FLOW
MATERIALS
SIMULATION