Electrohydrodynamic linear stability of two immiscible fluids in channel flow

Document Type

Article

Publication Date

7-28-2006

Abstract

The electrohydrodynamic instability of the interface between two viscous fluids with different electrical properties in plane Poiseuille flow has recently found applications in mixing and droplet formation in microfluidic devices. In this paper, we perform the stability analysis in the case where the fluids are assumed to be leaky dielectrics. The two-layer system is subjected to an electric field normal to the interface between the two fluids. We make no assumption on the magnitude of the ratio of fluid to electric time scales, and thus solve the full conservation equation for the interfacial charge. The electric field is found to be either stabilizing or destabilizing, and the influence of the various parameters of the problem on the interface stability is thoroughly analyzed. © 2006 Elsevier Ltd. All rights reserved.

Identifier

33746026332 (Scopus)

Publication Title

Electrochimica Acta

External Full Text Location

https://doi.org/10.1016/j.electacta.2006.02.002

ISSN

00134686

First Page

5316

Last Page

5323

Issue

25

Volume

51

Fund Ref

State of New Jersey Commission on Science and Technology

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