Please use this identifier to cite or link to this item: http://hdl.handle.net/1783.1/446

Electrokinetic generation of microvortex patterns in a microchannel liquid flow

Authors Ng, ASW
Hau, WLW
Lee, YK
Zohar, Y
Issue Date 2004
Source Journal of micromechanics and microengineering , v. 14, (2), 2004, FEB, p. 247-255
Summary The technology developed for micropatterning the electric surface charge to be negative, positive or neutral enables the realization of complex liquid flows in simple microchannels. A commercial CFD code is utilized to numerically simulate a variety of electrokinetically-generated liquid flows in a straight and uniform microchannel due to non-uniform surface charge distribution under an externally applied, steady electric field. We present design methodologies to electrokinetically drive vortical flows in any desired direction. In particular, we investigate surface charge patterns required to generate single or multi, co-rotating or counter-rotating, in-plane or out-of-plane vortices. Finally, in view of its potential application to microscale mixing, we discuss a surface charge pattern that can give rise to streamwise vorticity.
Subjects
ISSN 0960-1317
Rights Journal of micromechanics and microengineering © Copyright (2004) IOP Publishing Ltd. The Journal's web site is located at http://www.iop.org/EJ/journal/JMM
Language English
Format Article
Access View full-text via Web of Science
View full-text via Scopus
Find@HKUST
Files in this item:
File Description Size Format
micro_vortex_EOF_yklee_JMM_2004.pdf 458492 B Adobe PDF