WIT Press


The Effect Of Wall Slip On The Migration Rate Of Concentrated Suspensions In A Couette Device

Price

Free (open access)

Paper DOI

10.2495/MPF010211

Volume

30

Pages

11

Published

2001

Size

800 kb

Author(s)

Z. Fang, M.S. Ingber & A.A. Mammoli

Abstract

A rheological model for the flow of concentrated suspensions based on the volume-aver aged velocity of suspended particles in a viscous fluid has been developed. The so-called diffusive-flux model is employed to investigate the demixing rate of neutrally-buoyant suspensions in a wide gap Couette device. The model employs two tuning parameters (diffusion coefficients) KC and K^ which govern the relative rates and magnitudes of particle diffusion caused by gradients in the particle interaction frequency and viscosity, respectively. These tuning parameters were originally sized based on no-slip boundary conditions. However, because the velocity is volume-averaged over the fluid and solid phas

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