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Micromachines 2017, 8(5), 165; doi:10.3390/mi8050165

Electroosmotic Flows of Power-Law Fluids with Asymmetric Electrochemical Boundary Conditions in a Rectangular Microchannel

Department of Mechanical Engineering, Korea National University of Transportation, Chungju 27469, Korea
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Academic Editors: Xiangchun Xuan and Shizhi Qian
Received: 5 April 2017 / Revised: 11 May 2017 / Accepted: 17 May 2017 / Published: 20 May 2017
(This article belongs to the Special Issue Micro/Nano-Chip Electrokinetics, Volume II)
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Abstract

In this paper, a systematic study of a fully developed electroosmotic flow of power-law fluids in a rectangular microchannel bounded by walls with different zeta potentials is described. Because the upper and lower layers of most microchannels are made of different materials, it is necessary to study the flow characteristics for cases in which the microchannels have different zeta potentials at each wall. The electrical potential and momentum equations were solved numerically using a finite element analysis. The velocity profiles and flow rates were studied parametrically by varying the fluid behavior index, channel aspect ratio, and electrochemical properties of the liquid and the bounding walls. The calculated volumetric flow rates in a rectangular microchannel were compared with those between two infinite parallel plates. View Full-Text
Keywords: electroosmosis; power-law fluid; zeta potential; microchannel electroosmosis; power-law fluid; zeta potential; microchannel
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Choi, W.; Yun, S.; Choi, D.-S. Electroosmotic Flows of Power-Law Fluids with Asymmetric Electrochemical Boundary Conditions in a Rectangular Microchannel. Micromachines 2017, 8, 165.

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