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International Heat Transfer Conference 8

ISSN: 2377-424X (online)
ISSN: 2377-4371 (flashdrive)

Effective Conductivity of Shearing Particle Flows

Charles S. Campbell
Department of Mechanical Engineering, University of Southern California, Los Angeles, California 90089-1453 USA

David G. Wang
Department of Mechanical Engineering, University of Southern California, Los Angeles, California 90089-1453 USA

DOI: 10.1615/IHTC8.3700
pages 2567-2572

Abstract

The conductivity of a particle-air mixture was measured as the bulk material was sheared in an annular Couette shear cell. The resulting effective conductivity can be decomposed into a configuration-al component that is a function of the density of the mixture, and a dynamic component arising from the agitation of the mixture caused by the shearing of the bulk material. The dynamic augmentation in the conductivity is linearly proportional to the shear rate and appears to be relatively independent of the density.

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