Abstract
The Study of the dynamic aspects of electrokinetic flow is of importance to the development of relevant microfluidic technologies. This paper presents a systematic investigation on the frequency-dependent electrokinetic flow. Experiments were carried out to measure the frequency-dependent electrokinetic flows in a rectangular microchannel by using the micro-PIV technique. Under the slip velocity approximation, the Stokes equation was solved analytically, and the closed-form solution for the velocity distributions of steady oscillating electroosmotic flow in a rectangular microchannel was obtained. With the measured channel zeta potential, the theoretical predictions of the frequency-dependent electroosmotic velocity fields were validated with the experimental data obtained in this study.
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References
Stone HA, Strook AD, Ajdari A. Engineering flows in small devices: microfluidics toward a Lab-on-a-Chip. Rev. Fluid Mech., 2004; 36: 381–411
Chang HC. Electro-kineitcs: A viable micro-fluidic platform for miniature diagnostic kits. Can J Chem Eng., 2006; 84: 1–15
Sinton D. Microscale flow visualization. Microfluidics Nanofluidics, 2004;1:2–21.
Santiago JG, Wereley ST, Meinhart CD, et al. A particle image velocimetry system for microfluidics. Exp. Fluids, 1998; 25: 316–319
Devasenathipathy S, Santiago JG. Particle tracking techniques for electrokinetic microchannel flows. Anal. Chem., 2002; 74: 3704–3713
Kim MJ, Beskok A, Kihm KD. Electro-osmosis-driven micro-channel flows: a comparative study of microscopic particle image velocimetry measurements and numerical simulations. Exp. Fluids, 2002; 33: 170–180
MacInnes JM, Du X, Allen RWK. Prediction of electrokinetic and pressure flow in a microchannel T-junction. Phys Fluids, 2003; 15: 1992–2005
Yan DG, Yang C, Nguyen NT, Huang XY. A method for simultaneously determining the zeta potentials of the channel surface and the tracer particles using microparticle image velocimetry technique. Electrophoresis, 2006; 27: 620–627
Yang C. in: Tay F (Ed.), Microfluidics and BioMEMS. Kluwer Academic, Dordrecht, 2002
Telionis DP. Unsteady Viscous Flow. Springer-Verlag, New York, 1981
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© 2007 Tsinghua University Press & Springer
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Yan, D.G., Yang, C., Huang, X.Y., Lam, Y.C. (2007). Diagnosis of Frequency-Dependent Electrokinetic Flow in Microfluidic Channels. In: Zhuang, F.G., Li, J.C. (eds) New Trends in Fluid Mechanics Research. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-75995-9_227
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DOI: https://doi.org/10.1007/978-3-540-75995-9_227
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-540-75994-2
Online ISBN: 978-3-540-75995-9
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