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Dynamics of Grains in Driven Granular Media

Published online by Cambridge University Press:  10 February 2011

Narayanan Menon  and
Douglas J. Durian
Narayanan Menon
Affiliation:
Department of Physics and Astronomy, University of California, Los Angeles, CA 90095–1547
Douglas J. Durian
Affiliation:
Department of Physics and Astronomy, University of California, Los Angeles, CA 90095–1547
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Abstract

We use diffusing-wave spectroscopy (DWS) to study microscopic dynamics in the interior of 3-dimensional granular systems. We study two granular systems where particle motions are excited by different driving mechanisms – gravity-driven channel flow and a gas-fluidized bed. In both instances we obtain detailed information about short-time collisional dynamics such as rms velocity fluctuations, mean free paths, and collision frequencies. We also observe a slow crossover from short-time ballistic motions to long-time, grain-scale diffusive motions.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 463: Symposia EE – Statistical Mechanics in Physics and Biology , 1996 , 313
Copyright
Copyright © Materials Research Society 1997

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References

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