Gravity-driven dense granular flows
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.
- Publication:
-
EPL (Europhysics Letters)
- Pub Date:
- October 2001
- DOI:
- 10.1209/epl/i2001-00508-7
- arXiv:
- arXiv:cond-mat/0005051
- Bibcode:
- 2001EL.....56..214E
- Keywords:
-
- 45.70.Mg;
- 83.10.Rs;
- 83.80.Fg;
- Granular flow: mixing segregation and stratification;
- Computer simulation of molecular and particle dynamics;
- Granular solids;
- Condensed Matter - Soft Condensed Matter;
- Condensed Matter - Disordered Systems and Neural Networks
- E-Print:
- 4 pages, RevTeX 3.0, 4 PostScript figures (5 files) embedded with epsf