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Phys Rev Lett. 2000 Aug 14;85(7):1428-31.

Particle dynamics in sheared granular matter

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  • 1Physics Department, Haverford College, Haverford, Pennsylvania 19041, USA.

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.

PMID:
10970521
DOI:
10.1103/PhysRevLett.85.1428
[PubMed - as supplied by publisher]
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