Is free surface free in micro-scale electrokinetic flows?

Title
Is free surface free in micro-scale electrokinetic flows?
Author(s)
주상우최우석[최우석]임근배[임근배]스즈첸아슈샬마
Keywords
2-FLUID ELECTROOSMOTIC FLOW; ELECTRIC-FIELD; INSTABILITY; INTERFACE; ELECTROHYDRODYNAMICS; MICROCHANNELS; STABILITY; FILMS
Issue Date
201007
Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
Citation
JOURNAL OF COLLOID AND INTERFACE SCIENCE, v.347, no.1, pp.153 - 155
Abstract
When a rigid boundary is replaced by a free surface, or by a liquid-liquid interface, the shear stress is reduced near the boundary because the no-slip on the rigid boundary is relaxed. A nonzero fluid velocity exists on the free surface, and the flow rate would increase by the replacement. For electrokinetic flows, however, the replacement from rigid to free boundary can lead to an increase (decrease) in shear stress (flow rate). This counterintuitive effect of free surface is presented in this note for a generic electroosmotic flow in a microchannel. (C) 2010 Elsevier Inc. All rights reserved.
URI
http://hdl.handle.net/YU.REPOSITORY/22187http://dx.doi.org/10.1016/j.jcis.2010.03.049
ISSN
0021-9797
Appears in Collections:
공과대학 > 기계공학부 > Articles
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