Volume 56, Number 2, October 2001
|Page(s)||214 - 220|
|Section||Electromagnetism, optics, acoustics, heat transfer, classical mechanics and fluid mechanics|
|Published online||01 December 2003|
Gravity-driven dense granular flows
Corporate Strategic Research, ExxonMobil Research
and Engineering Route 22 East, Annandale, NJ 08801, USA
2 Sandia National Laboratories - Albuquerque, NM 87185-1411, USA
3 Department of Physics, Technion - Haifa, 32000 Israel
Accepted: 30 July 2001
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.
PACS: 45.70.Mg – Granular flow: mixing, segregation and stratification / 83.10.Rs – Computer simulation of molecular and particle dynamics / 83.80.Fg – Granular solids
© EDP Sciences, 2001
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