Journal of Fluid Mechanics

Papers

Slender-body approximations for electro-phoresis and electro-rotation of polarizable particles

EHUD YARIVa1

a1 Faculty of Mathematics, Technion – Israel Institute of Technology, Technion City 32000, Israel

Abstract

Slender-body asymptotic theory is used to evaluate the translational and rotational electrophoretic velocities of initially uncharged polarizable bodies of revolution. These velocities are obtained as asymptotic expansions in the small particle slenderness. Conducting particles which lack fore–aft symmetry translate parallel to the applied field direction, regardless of their orientation relative to it. Both conducting and dielectric particles tend to align with the field. The translational and rotational velocities of dielectric particles are asymptotically smaller than those of comparable conducting particles.

(Received May 05 2008)

(Revised July 17 2008)

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