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AC Electroosmotic Fluid Flow in Electrolytes Generated by Two Coplanar Microelectrodes

K. Adamiak
University of Western Ontario, CA

Keywords:
microfluidics, AC electroosmosis, numerical simulation

Abstract:
AC electroosmotic pumping of fluids is studied in the model consisting of two thin coplanar electrodes, deposited on a dielectric substrate and placed in an aqueous solution. An AC voltage is supplied to the electrodes and a cloud of space charge forms in a very thin layer close to the conducting surfaces. When an AC voltage is applied the ions form a so-called dynamic double layer, with ions traveling towards and away from the electrodes. The results of numerical simulation of this problem are presented in the paper. The effect on the voltage velocity on the fluid flow velocity pattern is studied.

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