期刊
MICROFLUIDICS AND NANOFLUIDICS
卷 11, 期 3, 页码 255-267出版社
SPRINGER HEIDELBERG
DOI: 10.1007/s10404-011-0793-6
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资金
- Council of Scientific and Industrial Research (CSIR), India
- Department of Information Technology, Govt. of India
In this article, we investigate the implications of electroosmosis with interfacial slip on electrohydrodynamic transport in microchannels having complex (yet symmetric) cross-sectional shapes, by employing a generic semi-analytical approach. We also devise an approximate technique of flow rate prediction under these conditions, using a combined consideration of electroosmotic slip (under thin electrical double layer limits) and Navier slip conditions (originating out of confinement-induced hydrophobic interactions) at the fluid-solid interface. We further assess the effectiveness of the approximate solutions in perspective of the exact solutions, as a parametric function of the relative thickness of the electrical double layer with respect to the channel hydraulic diameter. We illustrate the underlying consequences through examples of elliptic, polygonal, point star-shaped, and annular microchannel cross sections.
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