Particle Dynamics in Sheared Granular Matter

2000/04/24 by Wolfgang Losert, W. Losert, Lydéric Bocquet +3 · 8 citations
Engineering · Environmental Science · Physics and Astronomy · #Granular flow and fluidized beds #Landslides and related hazards #Planetary Science and Exploration #cond-mat.soft #cond-mat.stat-mech

paper · pdf · doi:10.1103/physrevlett.85.1428

arxiv created 2000/04/24 · openalex publication_date 2000/08/14 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

The particle dynamics and shear forces of granular matter in a Couette geometry are determined experimentally. The normalized tangential velocity V(y) declines strongly with distance y from the moving wall, independent of the shear rate and of the shear dynamics. Local rms velocity fluctuations deltaV(y) scale with the local velocity gradient to the power 0.4+/-0.05. These results agree with a locally Newtonian, continuum model, where the granular medium is assumed to behave as a liquid with a local temperature [deltaV(y)](2) and density dependent viscosity.

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