The Mathematical Institute, University of Oxford, Eprints Archive

Axial Dispersion via Shear-enhanced Diffusion in Colloidal
Suspensions

Griffiths, I. M. and Stone, H. A. (2012) Axial Dispersion via Shear-enhanced Diffusion in Colloidal
Suspensions.
Europhysics Letters . (Submitted)

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Abstract

The familiar example of Taylor dispersion of molecular solutes is extended to describe colloidal suspensions, where the fluctuations that contribute to dispersion arise from hydrodynamic interactions. The generic scheme is illustrated for a suspension of particles in a pressure-driven pipe flow, with a concentration-dependent diffusivity that captures both the shear-induced and Brownian contributions. Analytic and numerical solutions are presented that highlight the effect of the concentration dependence of this nonlinear hydrodynamic mechanism, and the results are contrasted with the classical thermally driven Taylor dispersion.

Item Type:Article
Subjects:D - G > General
Research Groups:Oxford Centre for Collaborative Applied Mathematics
ID Code:1483
Deposited By:Peter Hudston
Deposited On:02 Mar 2012 07:48
Last Modified:08 Oct 2012 14:05

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