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Computer simulation of granular shear flows

Published online by Cambridge University Press:  20 April 2006

Charles S. Campbell  and
Christopher E. Brennen
Charles S. Campbell
Affiliation:
Division of Engineering and Applied Science, California Institute of Technology, Pasadena, CA 91125 Present address: Department of Mechanical Engineering, University of Southern California, Los Angeles, CA 90089-1453.
Christopher E. Brennen
Affiliation:
Division of Engineering and Applied Science, California Institute of Technology, Pasadena, CA 91125
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Abstract

Detailed understanding of flowing granular materials is severely hampered by the deficiencies of present experimental methods. To help increase the information base, a computer simulation has been developed to describe two-dimensional unidirectional flows of inelastic fully rough particles. This paper presents the results of a Couette shear-flow simulation. The results include distributions of velocity, density and granular temperature (a measure of the kinetic energy contained in the random particle motions). The effects of density and shear rate on the granular temperature are explored. Shear and normal forces on the solid walls are compared with experimental and theoretical results. The behaviour of the particles in the simulated flow is examined and assessments are made of the collision angle and velocity distributions. The development of a distinct, ‘layered’ microstructure is observed in high-density granular flows.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 151 , February 1985 , pp. 167 - 188
Copyright
© 1985 Cambridge University Press

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