Developing pressure-driven liquid flow in microchannels under the electrokinetic effect

被引：53
|
作者：
Chen, XY [1 ]
Toh, KC [1 ]
Chai, JC [1 ]
Yang, C [1 ]
机构：
[1] Nanyang Technol Univ, Sch Mech & Prod Engn, Singapore 639798, Singapore
来源：
INTERNATIONAL JOURNAL OF ENGINEERING SCIENCE | 2004年 / 42卷 / 5-6期
关键词：
Electrokinetic (electroviscous) effect; developing microchannel flow; the Nernst-Planck equation; Boltzmann distribution; developing streaming potential;
D O I：
10.1016/j.ijengsci.2003.07.008
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A mathematical model is developed to study the electrokinetic effect on liquid developing flow in a parallel slit including the general Nernst-Planck equation describing anion and cation distributions, the Poisson equation determining the electrical potential profile, and the modified Navier-Stokes equation governing the velocity flow field. Since these three equations are coupled, a numerical scheme based on the finite volume method is utilized to iteratively solve the proposed model. A new expression for the streaming potential in the case of the developing flow status is derived. The characteristics of the pressure-driven flow in the presence of the electrokinetic effect are examined. (C) 2003 Elsevier Ltd. All rights reserved.
引用
收藏
页码：609 / 622
页数：14
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