Gravity-driven dense granular flows

D. Ertaş; G. S. Grest; T. C. Halsey; D. Levine; L. E. Silbert

doi:10.1209/epl/i2001-00508-7

Gravity-driven dense granular flows

D. Ertaş
, G. S. Grest
, T. C. Halsey
, D. Levine
, L. E. Silbert

Research output: Contribution to journal › Article › peer-review

66 Scopus citations

Abstract

We report and analyze the results of numerical studies of dense granular flows on an incline with a "rough" bottom in two and three dimensions, using linear damped spring or Hertzian force laws between particles with a Coulomb failure criterion. This flow geometry produces a constant density profile that satisfies scaling relations of the Bagnold, rather than viscous, kind. The type of force law has little impact on the behavior of the system. The bulk and the surface layer differ in their rheology, as evidenced by the change in principal stress directions near the surface. Surface-only flows are not observed for the cases studied.

Original language	English
Pages (from-to)	214-220
Number of pages	7
Journal	EPL
Volume	56
Issue number	2
DOIs	https://doi.org/10.1209/epl/i2001-00508-7
State	Published - Oct 11 2001
Externally published	Yes

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T1 - Gravity-driven dense granular flows

AU - Ertaş, D.

AU - Grest, G. S.

AU - Halsey, T. C.

AU - Levine, D.

AU - Silbert, L. E.

PY - 2001/10/11

Y1 - 2001/10/11

N2 - We report and analyze the results of numerical studies of dense granular flows on an incline with a "rough" bottom in two and three dimensions, using linear damped spring or Hertzian force laws between particles with a Coulomb failure criterion. This flow geometry produces a constant density profile that satisfies scaling relations of the Bagnold, rather than viscous, kind. The type of force law has little impact on the behavior of the system. The bulk and the surface layer differ in their rheology, as evidenced by the change in principal stress directions near the surface. Surface-only flows are not observed for the cases studied.

AB - We report and analyze the results of numerical studies of dense granular flows on an incline with a "rough" bottom in two and three dimensions, using linear damped spring or Hertzian force laws between particles with a Coulomb failure criterion. This flow geometry produces a constant density profile that satisfies scaling relations of the Bagnold, rather than viscous, kind. The type of force law has little impact on the behavior of the system. The bulk and the surface layer differ in their rheology, as evidenced by the change in principal stress directions near the surface. Surface-only flows are not observed for the cases studied.

UR - https://www.scopus.com/pages/publications/0035797942

U2 - 10.1209/epl/i2001-00508-7

DO - 10.1209/epl/i2001-00508-7

M3 - Article

SN - 0295-5075

VL - 56

SP - 214

EP - 220

JO - EPL

JF - EPL

IS - 2

ER -

Gravity-driven dense granular flows

Abstract

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