Mixing enhancement in microfluidic channel with a constriction under periodic electro-osmotic flow
We present a new approach to enhance mixing in T-type micromixers by introducing a constriction in the microchannel under periodic electro-osmotic flow. Two sinusoidal ac electric fields with 180° phase difference and similar dc bias are applied at the two inlets. The out of phase ac electric field...
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sg-ntu-dr.10356-969382023-03-04T17:18:10Z Mixing enhancement in microfluidic channel with a constriction under periodic electro-osmotic flow Lim, Chun Yee Lam, Yee Cheong Yang, Chun DRNTU::Engineering::Mechanical engineering We present a new approach to enhance mixing in T-type micromixers by introducing a constriction in the microchannel under periodic electro-osmotic flow. Two sinusoidal ac electric fields with 180° phase difference and similar dc bias are applied at the two inlets. The out of phase ac electric field induces oscillation of fluid interface at the junction of the two inlet channels and the constriction. Due to the constriction introduced at the junction, fluids from these two inlets form alternative plugs at the constricted channel. These plugs of fluids radiate downstream from the constriction into the large channel and form alternate thin crescent-shaped layers of fluids. These crescent-shaped layers of fluids increase tremendously the contact surface area between the two streams of fluid and thus enhance significantly the mixing efficiency. Experimental results and mixing mechanism analysis show that amplitude and frequency of the ac electric field and the length of the constriction govern the mixing efficiency. Published version 2013-06-11T07:24:29Z 2019-12-06T19:36:53Z 2013-06-11T07:24:29Z 2019-12-06T19:36:53Z 2010 2010 Journal Article Lim, C. Y., Lam, Y. C., & Yang, C. (2010). Mixing enhancement in microfluidic channel with a constriction under periodic electro-osmotic flow. Biomicrofluidics, 4(1). 1932-1058 https://hdl.handle.net/10356/96938 http://hdl.handle.net/10220/10196 10.1063/1.3279790 20644670 173612 en Biomicrofluidics © 2010 American Institute of Physics. This paper was published in Biomicrofluidics and is made available as an electronic reprint (preprint) with permission of American Institute of Physics. The paper can be found at the following official DOI: [http://dx.doi.org/10.1063/1.3279790]. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law. application/pdf |
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DRNTU::Engineering::Mechanical engineering Lim, Chun Yee Lam, Yee Cheong Yang, Chun Mixing enhancement in microfluidic channel with a constriction under periodic electro-osmotic flow |
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We present a new approach to enhance mixing in T-type micromixers by introducing a constriction in the microchannel under periodic electro-osmotic flow. Two sinusoidal ac electric fields with 180° phase difference and similar dc bias are applied at the two inlets. The out of phase ac electric field induces oscillation of fluid interface at the junction of the two inlet channels and the constriction. Due to the constriction introduced at the junction, fluids from these two inlets form alternative plugs at the constricted channel. These plugs of fluids radiate downstream from the constriction into the large channel and form alternate thin crescent-shaped layers of fluids. These crescent-shaped layers of fluids increase tremendously the contact surface area between the two streams of fluid and thus enhance significantly the mixing efficiency. Experimental results and mixing mechanism analysis show that amplitude and frequency of the ac electric field and the length of the constriction govern the mixing efficiency. |
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Article |
author |
Lim, Chun Yee Lam, Yee Cheong Yang, Chun |
author_facet |
Lim, Chun Yee Lam, Yee Cheong Yang, Chun |
author_sort |
Lim, Chun Yee |
title |
Mixing enhancement in microfluidic channel with a constriction under periodic electro-osmotic flow |
title_short |
Mixing enhancement in microfluidic channel with a constriction under periodic electro-osmotic flow |
title_full |
Mixing enhancement in microfluidic channel with a constriction under periodic electro-osmotic flow |
title_fullStr |
Mixing enhancement in microfluidic channel with a constriction under periodic electro-osmotic flow |
title_full_unstemmed |
Mixing enhancement in microfluidic channel with a constriction under periodic electro-osmotic flow |
title_sort |
mixing enhancement in microfluidic channel with a constriction under periodic electro-osmotic flow |
publishDate |
2013 |
url |
https://hdl.handle.net/10356/96938 http://hdl.handle.net/10220/10196 |
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1759853659787624448 |