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Shear-induced resuspension in a couette device

1993; Elsevier BV; Volume: 19; Issue: 5 Linguagem: Inglês

10.1016/0301-9322(93)90043-t

1879-3533

Andreas Acrivos, Roberto Mauri, Fan Xie,

Fluid Dynamics and Turbulent Flows

The viscous resuspension of an initially settled bed of particles resulting from the application of a laminar shear flow was studied experimentally in a narrow-gap Couette device. The measured height of the resuspended layer was found to be in excellent agreement with that predicted theoretically using a model developed by Leighton & Acrivos, in which the downward gravitational particle flux is balanced by a corresponding upward flux due to shear-induced particle diffusion.