Electrokinetic Flow through an Elliptical Microchannel: Effects of Aspect Ratio and Electrical Boundary Conditions

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Title:	Electrokinetic Flow through an Elliptical Microchannel: Effects of Aspect Ratio and Electrical Boundary Conditions
Authors:	Hsu, Jyh-ping;Kao, C. Y.;曾琇瑱;Tseng, Shio-jenn;Chen, C. J.
Contributors:	淡江大學數學學系
Keywords:	electrokinetic phenomenon;elliptical microchannel;aspect ratio;electroosmotic flow;electroviscous effect
Date:	2002-04-01
Issue Date:	2010-01-28 07:10:40 (UTC+8)
Publisher:	Elsevier
Abstract:	The electrokinetic flow of an electrolyte solution through an elliptical microchannel is studied theoretically. The system under consideration simulates the flow of a fluid, for example, in vein. We show that, for a constant cross-sectional area, both the electroosmotic volumetric flow rate and the streaming potential increase monotonically with an increase in the aspect ratio, and both the total electric current and the electroviscous effect may exhibit a local minimum as the aspect ratio varies. Also, for a constant average potential on the channel wall, the difference between the results based on three kinds of boundary conditions, which include constant surface charge, constant surface potential, and charge-regulated surface, is inappreciable if the hydraulic diameter is larger than 1 μm.
Relation:	Journal of Colloid and Interface Science 248(1), pp.176-184
DOI:	10.1006/jcis.2001.8200
Appears in Collections:	[Graduate Institute & Department of Mathematics] Journal Article

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