Phys. Rev. Lett. 85, 1428–1431 (2000)Particle Dynamics in Sheared Granular MatterReceived 21 April 2000; published in the issue dated 14 August 2000 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 δV(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 [δV(y)]2 and density dependent viscosity. © 2000 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.85.1428
DOI:
10.1103/PhysRevLett.85.1428
PACS:
45.70.Mg, 47.50.+d, 83.70.Fn
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