Particle dynamics in sheared granular matter

by: W Losert, L Bocquet, TC Lubensky, JP Gollub

Phys Rev Lett, Vol. 85, No. 7. (14 August 2000), pp. 1428-1431.

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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.

@article{losert2000, 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.}, address = {Physics Department, Haverford College, Haverford, Pennsylvania 19041, USA.}, author = {Losert, W. and Bocquet, L. and Lubensky, T. C. and Gollub, J. P. }, citeulike-article-id = {2477358}, issn = {0031-9007}, journal = {Phys Rev Lett}, keywords = {dem, discrete\_element\_method, granular, granular\_flow, shear\_flow}, month = {August}, number = {7}, pages = {1428--1431}, posted-at = {2008-03-06 06:32:56}, priority = {2}, title = {Particle dynamics in sheared granular matter}, url = {http://view.ncbi.nlm.nih.gov/pubmed/10970521}, volume = {85}, year = {2000} }

RIS record

TY - JOUR ID - losert2000 L3 - citeulike-article-id:2477358 TI - Particle dynamics in sheared granular matter JF - Phys Rev Lett VL - 85 IS - 7 SP - 1428 EP - 1431 AD - Physics Department, Haverford College, Haverford, Pennsylvania 19041, USA. SN - 0031-9007 N2 - 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. KW - dem KW - discrete_element_method KW - granular KW - granular_flow KW - shear_flow AU - Losert, W AU - Bocquet, L AU - Lubensky, TC AU - Gollub, JP PY - 2000/08/14/ UR - http://view.ncbi.nlm.nih.gov/pubmed/10970521 ER -

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