On steady two-fluid electroosmotic flow with full interfacial electrostatics

Choi, WooSeok ; Sharma, Ashutosh ; Qian, Shizhi ; Lim, Geunbae ; Joo, Sang Woo (2011) On steady two-fluid electroosmotic flow with full interfacial electrostatics Journal of Colloid and Interface Science, 357 (2). pp. 521-526. ISSN 0021-9797

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Official URL: http://www.sciencedirect.com/science/article/pii/S...

Related URL: http://dx.doi.org/10.1016/j.jcis.2011.01.107

Abstract

A two-fluid electroosmotic flow in a microchannel is studied by considering full hydrodynamic and electrostatic interactions on the interface. Jumps in electrical potential and in charge density across the interface, in particular, are found to create counterintuitive flow behavior through the electrostatic interaction of the interface with the external field imposed. The interfacial electrostatic effects are shown to induce flow reversal within physically reasonable parametric ranges. It is also shown that the electrostatic properties of the interface must be carefully considered in electroosmotic pumping lest the nonconducting fluid should stay stationary or flow in an unintended direction. A formula for quantitative control of electroosmotic pumping is provided.

Item Type:Article
Source:Copyright of this article belongs to Elsevier Science.
Keywords:Electroosmosis; Interface; Maxwell Stress; Two-fluid
ID Code:47035
Deposited On:06 Jul 2011 11:13
Last Modified:06 Jul 2011 11:13

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