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Hydrodynamics of electrophoretic motion in an alternating electric field

Published online by Cambridge University Press:  26 April 2006

R. P. Sawatzky  and
A. J. Babchin
R. P. Sawatzky
Affiliation:
Alberta Research Council, Oil Sands and Hydrocarbon Recovery Department, PO Box 8330, Station F, Edmonton, Alberta T6H 5X2, Canada
A. J. Babchin
Affiliation:
Alberta Research Council, Oil Sands and Hydrocarbon Recovery Department, PO Box 8330, Station F, Edmonton, Alberta T6H 5X2, Canada
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Abstract

Electrophoresis in an alternating electric field is the basis for electroacoustical measurements. These measurements provide new means of investigating the electrokinetic properties of colloidal systems. In order to relate electroacoustical signals to the charge and the size of colloidal particles, an expression is required for the dynamic electrophoretic mobility of colloidal particles in a continuous fluid. In this paper, an exact analytical solution to the problem is given for an arbitrary ratio between the particle radius and the electric double-layer thickness, in the case where the electrokinetic potential of the uniformly charged particle is small and unaffected by the alternating field.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 246 , January 1993 , pp. 321 - 334
Copyright
© 1993 Cambridge University Press

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