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Dense, rapid flows of inelastic grains under gravity
1Laboratoire des Milieux Désordonnés et Hétérogènes, CNRS-UMR 7603 - Case 86, Université Pierre et Marie Curie, 4 Place Jussieu, 75252 Paris Cedex 05, France.
Physical Review Letters
|May 7, 2003
Summary
We developed a new model for rapid granular flows that accounts for inelastic loss and collapse, accurately describing experimental velocity profiles in dense gravity-driven flows.
Area of Science:
- Physics
- Granular Flow Dynamics
- Fluid Mechanics
Background:
- Standard hydrodynamic descriptions fail for rapid granular flows in the dense limit.
- Inelastic loss and collapse are critical factors in these flow regimes.
Purpose of the Study:
- To propose a new model for rapid granular flows.
- To accurately describe experimental velocity profiles in dense gravity-driven flows.
Main Methods:
- Developed a novel approach using a nonlocal dissipation scheme.
- Focused on incorporating inelastic loss and collapse mechanisms.
Main Results:
- The proposed model qualitatively and quantitatively matches experimental findings.
- Successfully predicted the linear velocity profile observed in experiments.
Conclusions:
- The nonlocal dissipation scheme provides a more accurate description of rapid granular flows.
- This model advances the understanding of dense gravity-driven granular systems.