Electrophoretic transport through channels of periodically varying cross section

Ehud Yariv, Kevin D. Dorfman

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47 Scopus citations


We analyze the electrophoretic transport of a point-sized Brownian particle in a narrow channel of periodically varying cross section. The mean long-time transport coefficients (effective velocity and dispersivity) are calculated using generalized Taylor-Aris dispersion (macrotransport) theory for spatially periodic media. Analytical results for slowly varying geometries are obtained using a long-wavelength perturbation scheme for both O(1) and large Péclet numbers.

Original languageEnglish (US)
Article number037101
JournalPhysics of Fluids
Issue number3
StatePublished - Mar 2007

Bibliographical note

Funding Information:
K.D.D. acknowledges the support of the Camille and Henry Dreyfus Foundation New Faculty Award Program.


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