On steady two-fluid electroosmotic flow with full interfacial electrostatics

被引：40

作者：

Choi, WooSeok ^{[2
,3
]}

Sharma, Ashutosh ^{[1
,4
]}

Qian, Shizhi ^{[1
,5
]}

Lim, Geunbae ^{[2
,3
]}

Joo, Sang Woo ^{[1
]}

机构：

[1] Yeungnam Univ, Sch Mech Engn, Gyongsan 705030, South Korea

[2] Postech, Dept Mech Engn, Pohang 790784, South Korea

[3] Postech, Div Integrat Biosci & Biotechnol, Pohang 790784, South Korea

[4] Indian Inst Technol, Dept Chem Engn, Kanpur 208016, Uttar Pradesh, India

[5] Old Dominion Univ, Dept Aerosp Engn, Norfolk, VA 23529 USA

来源：

JOURNAL OF COLLOID AND INTERFACE SCIENCE | 2011年 / 357卷 / 02期

基金：

新加坡国家研究基金会;

关键词：

Electroosmosis; Interface; Maxwell stress; Two-fluid; ELECTRIC-FIELD; ELECTROHYDRODYNAMICS; INSTABILITY;

D O I：

10.1016/j.jcis.2011.01.107

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

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. (C) 2011 Elsevier Inc. All rights reserved.

引用

页码：521 / 526

页数：6

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