RHEOLOGY OF DENSE GRANULAR FLOW

Thomas C. Halsey, Deniz Ertaş, Gary S. Grest, Leonardo E. Silbert and Dov Levine
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Thomas C. Halsey: ExxonMobil Research and Engineering, Route 22 East, Annandale, NJ 08801, USA
Deniz Ertaş: ExxonMobil Research and Engineering, Route 22 East, Annandale, NJ 08801, USA
Gary S. Grest: Sandia National Laboratories, Albuquerque, NM 87185, USA
Leonardo E. Silbert: Sandia National Laboratories, Albuquerque, NM 87185, USA
Dov Levine: Department of Physics, Technion, Haifa, 32000, Israel

Advances in Complex Systems (ACS), 2001, vol. 04, issue 04, 419-428

Abstract: We have performed numerical studies of dense granular flows on an incline with a rough bottom in two and three dimensions. This flow geometry produces a constant density profile that satisfies scaling relations of the Bagnold, rather than the viscous, kind. No surface-only flows were observed. The bulk and the surface layer differ in their rheology, as evidenced by the change in principal stress directions near the surface; a Mohr–Coulomb type failure criterion is seen only near the surface. In the bulk, normal stress anomalies are observed both in two and in three dimensions. We do not observe isostaticity in static frictional piles obtained by arresting the flow.

Keywords: Granular flow; rheology; non-Newtonian fluid dynamics; granular packings; powder mechanics; iso-staticity (search for similar items in EconPapers)
Date: 2001
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DOI: 10.1142/S0219525901000279

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