Electro-hydrodynamic micro-fluidic mixer

Document Type

Article

Publication Date

7-19-2006

Abstract

A simple geometry micro-mixer is proposed based on the electro-hydrodynamic (EHD) force present when the fluids to be mixed have different electrical properties and are subjected to an electric field. The electrodes are arranged so that the generated electrical force is perpendicular to the interface between the two fluids, creating a transversal secondary flow. The technique is demonstrated experimentally using two fluid with identical viscosity and density, but different electrical properties, flowing in a straight microchannel. The particular Reynolds number in our experiments is less than 0.02. The effect of a Continuous (DC) electric field and two alternating (AC) - sinusoidal and square - electric fields is explored, as well as the role played by the magnitude and frequency of the applied voltage. At the appropriate parameters values, very good and fast mixing takes place over a very short distance.

Identifier

33745874979 (Scopus)

Publication Title

Houille Blanche

ISSN

00186368

First Page

31

Last Page

37

Issue

3

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