Griffiths, I. M. and Stone, H. A.
Axial Dispersion via Shear-enhanced Diffusion in Colloidal
Suspensions. Europhysics Letters . (Submitted)
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.
|Subjects:||D - G > General|
|Research Groups:||Oxford Centre for Collaborative Applied Mathematics|
|Deposited By:||Peter Hudston|
|Deposited On:||02 Mar 2012 07:48|
|Last Modified:||29 May 2015 19:10|
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