Shear-induced diffusion of platelike particles in microchannels

Roberto Rusconi, Howard A. Stone

Research output: Contribution to journalArticle

27 Scopus citations

Abstract

We exploit the recent developments of microfluidic technologies to investigate the collective shear-induced diffusion in suspensions of micron-sized particles. Whereas spherical particles do not diffuse on the time scale of our experiments, the results with platelike clay particles show a strong cross-stream shear-induced diffusivity at low volume fraction (0≤0.01). Moreover, we find a linear dependence of the collective diffusion coefficient with the average shear rate (in the range 102-104s-1) and the particle concentration. These data are in good agreement with previous experimental and theoretical results for spheres when rescaled with the particle number density.

Original languageEnglish (US)
Article number254502
JournalPhysical review letters
Volume101
Issue number25
DOIs
StatePublished - Dec 15 2008
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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