✦ LIBER ✦

Viscous resuspension

✍ Scribed by David Leighton; Andreas Acrivos

Publisher: Elsevier Science
Year: 1986
Tongue: English
Weight: 900 KB
Volume: 41
Category: Article
ISSN: 0009-2509
DOI: 10.1016/0009-2509(86)85225-3

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✦ Synopsis

The resuspension of a settled layer of particles in a shear Bow, typically associated with turbulence, has also been found to occur under viscous conditions (Gadala-Maria F. A.. 1979. Ph.D. Thesis. Stanford University). In this work we demonstrate that vi&us resuspension, characterized by the equilibrium height achieved by an initially settled bed of particles expanding in the presence of an applied shear stress, results from a balance between the downward flux ofparticles due to gravity and an upward flux arising from shear-induced particle diffusion. Predictions of this equilibrium height using independent measurements of the shear-induced diffusion coefficient are shown to be in approximate agreement with experimental observations.

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