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The primary electroviscous effect in a suspension of rods

Published online by Cambridge University Press:  20 April 2006

J. D. Sherwood
J. D. Sherwood
Affiliation:
Unilever Research, Port Sunlight Laboratory, Quarry Road East, Bebington, Wirral, Merseyside
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Abstract

Calculations of the primary electroviscous effect have previously been restricted to spherical particles. Here we examine a suspension of randomly orientated rod-shaped particles of length l. Two competing mechanisms are present in a linear velocity field. The flow relative to each rod is largest at the rod ends. When l is large the consequent large distortion of the charge cloud increases the electroviscous effect. On the other hand, the given total charge on a uniformly charged rod is spread more thinly as l increases, and this tends to reduce the electroviscous effect. The balance of these two mechanisms is examined.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 111 , October 1981 , pp. 347 - 366
Copyright
© 1981 Cambridge University Press

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