Axial dispersion via shear-enhanced diffusion in colloidal suspensions

Handle URI:
http://hdl.handle.net/10754/597641
Title:
Axial dispersion via shear-enhanced diffusion in colloidal suspensions
Authors:
Griffiths, I. M.; Stone, H. A.
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. The effect of the cross-stream migration via shear-induced diffusion is shown to dramatically reduce the axial dispersion predicted by classical Taylor dispersion for a molecular solute. Analytic and numerical solutions are presented that illustrate the effect of the concentration dependence of this nonlinear hydrodynamic mechanism. Copyright © EPLA, 2012.
Publisher:
IOP Publishing
Journal:
EPL (Europhysics Letters)
KAUST Grant Number:
KUK-C1-013-04
Issue Date:
1-Mar-2012
DOI:
10.1209/0295-5075/97/58005
Type:
Article
ISSN:
0295-5075; 1286-4854
Sponsors:
This publication is based on work partially supported by Award No. KUK-C1-013-04, made by King Abdullah University of Science and Technology (KAUST). We gratefully acknowledge helpful discussions with J. M. ARISTOFF, Y. DAVIT, W. HOLLOWAY, P. D. HOWELL, M. REYSSAT, R. RUSCONI and R. W. STYLE. We thank E. J. HINCH for helpful feedback with the paper, including the argument for the correlation distance, and thank an anonymous referee for emphasizing the distinctions between the various modes of diffusive transport in suspensions.
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Full metadata record

DC FieldValue Language
dc.contributor.authorGriffiths, I. M.en
dc.contributor.authorStone, H. A.en
dc.date.accessioned2016-02-25T12:43:34Zen
dc.date.available2016-02-25T12:43:34Zen
dc.date.issued2012-03-01en
dc.identifier.issn0295-5075en
dc.identifier.issn1286-4854en
dc.identifier.doi10.1209/0295-5075/97/58005en
dc.identifier.urihttp://hdl.handle.net/10754/597641en
dc.description.abstractThe 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. The effect of the cross-stream migration via shear-induced diffusion is shown to dramatically reduce the axial dispersion predicted by classical Taylor dispersion for a molecular solute. Analytic and numerical solutions are presented that illustrate the effect of the concentration dependence of this nonlinear hydrodynamic mechanism. Copyright © EPLA, 2012.en
dc.description.sponsorshipThis publication is based on work partially supported by Award No. KUK-C1-013-04, made by King Abdullah University of Science and Technology (KAUST). We gratefully acknowledge helpful discussions with J. M. ARISTOFF, Y. DAVIT, W. HOLLOWAY, P. D. HOWELL, M. REYSSAT, R. RUSCONI and R. W. STYLE. We thank E. J. HINCH for helpful feedback with the paper, including the argument for the correlation distance, and thank an anonymous referee for emphasizing the distinctions between the various modes of diffusive transport in suspensions.en
dc.publisherIOP Publishingen
dc.titleAxial dispersion via shear-enhanced diffusion in colloidal suspensionsen
dc.typeArticleen
dc.identifier.journalEPL (Europhysics Letters)en
dc.contributor.institutionPrinceton University, Princeton, United Statesen
dc.contributor.institutionUniversity of Oxford, Oxford, United Kingdomen
kaust.grant.numberKUK-C1-013-04en
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