Physics of Fluids - Publications

Quantification of electrical field-induced flow reversal in a microchannel

Lab on a Chip 8, 945–949 (2008)

Authors

	Christophe Pirat
	Aurore Naso
	E. J. van der Wouden
	Han J. G. E. Gardeniers
	Detlef Lohse
	Albert van den Berg

BibTeΧ

@Article{B802800A,
author ="Pirat, C. and Naso, A. and van der Wouden, E. J. and Gardeniers, J. G. E. and Lohse, D. and van den Berg, A.",
title  ="Quantification of electrical field-induced flow reversal in a microchannel",
journal  ="Lab Chip",
year  ="2008",
volume  ="8",
issue  ="6",
pages  ="945-949",
publisher  ="The Royal Society of Chemistry",
doi  ="10.1039/B802800A",
url  ="http://dx.doi.org/10.1039/B802800A",
abstract  ="We characterize the electroosmotic flow in a microchannel with field effect flow control. High resolution measurements of the flow velocity{,} performed by micro particle image velocimetry{,} evidence the flow reversal induced by a local modification of the surface charge due to the presence of the gate. The shape of the microchannel cross-section is accurately extracted from these measurements. Experimental velocity profiles show a quantitative agreement with numerical results accounting for this exact shape. Analytical predictions assuming a rectangular cross-section are found to give a reasonable estimate of the velocity far enough from the walls."}