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Conference Paper: Effect of wall pattern configurations on Stokes flow through a microchannel with superhydrophobic slip

TitleEffect of wall pattern configurations on Stokes flow through a microchannel with superhydrophobic slip
Authors
Issue Date2010
PublisherAmerican Astronomical Society. The Journal's web site is located at http://www.aas.org/publications/baas/baas.html
Citation
The 63rd Annual Meeting of the American Physical Society (APS) Division of Fluid Dynamics, Long Beach, California, USA, 21–23 November 2013. In Bulletin of the American Astronomical Society, 2010, v. 55 n. 16, abstract no. CM.00002 How to Cite?
AbstractThe present work aims to study low-Reynolds-number flow through a microchannel with superhydrophobic surfaces, which contain a periodic array of parallel ribs on the upper and lower walls. Mimicking impregnation, the liquid is allowed to penetrate the grooves between the ribs which are filled with an inviscid gas. The array of ribs and grooves gives a heterogeneous wall boundary condition to the channel flow, with partial-slip boundary condition on the solid surface and no-shear boundary condition on the liquid-gas interface. Using the method of eigenfunction expansions and domain decomposition, semi-analytical models are developed for four configurations. Two of them are for longitudinal flow and the others are for transverse flow. For each flow orientation, in-phase and out-phase alignments of ribs between the upper and lower walls are analyzed. The effect of the phase alignments of ribs is appreciable when the channel height is sufficiently small. In-phase alignment gives rise to a larger effective slip length in longitudinal flow. On the contrary, out-phase alignment will yield a larger effective slip length in transverse flow. This work was supported by the Research Grants Council of the Hong Kong Special Administrative Region, China, through Project HKU 7156/09E.
DescriptionSession CM Microfluids: General II
Persistent Identifierhttp://hdl.handle.net/10722/197314
ISSN

 

DC FieldValueLanguage
dc.contributor.authorMak, HMHen_US
dc.contributor.authorNg, COen_US
dc.date.accessioned2014-05-23T02:40:16Z-
dc.date.available2014-05-23T02:40:16Z-
dc.date.issued2010en_US
dc.identifier.citationThe 63rd Annual Meeting of the American Physical Society (APS) Division of Fluid Dynamics, Long Beach, California, USA, 21–23 November 2013. In Bulletin of the American Astronomical Society, 2010, v. 55 n. 16, abstract no. CM.00002en_US
dc.identifier.issn0002-7537-
dc.identifier.urihttp://hdl.handle.net/10722/197314-
dc.descriptionSession CM Microfluids: General II-
dc.description.abstractThe present work aims to study low-Reynolds-number flow through a microchannel with superhydrophobic surfaces, which contain a periodic array of parallel ribs on the upper and lower walls. Mimicking impregnation, the liquid is allowed to penetrate the grooves between the ribs which are filled with an inviscid gas. The array of ribs and grooves gives a heterogeneous wall boundary condition to the channel flow, with partial-slip boundary condition on the solid surface and no-shear boundary condition on the liquid-gas interface. Using the method of eigenfunction expansions and domain decomposition, semi-analytical models are developed for four configurations. Two of them are for longitudinal flow and the others are for transverse flow. For each flow orientation, in-phase and out-phase alignments of ribs between the upper and lower walls are analyzed. The effect of the phase alignments of ribs is appreciable when the channel height is sufficiently small. In-phase alignment gives rise to a larger effective slip length in longitudinal flow. On the contrary, out-phase alignment will yield a larger effective slip length in transverse flow. This work was supported by the Research Grants Council of the Hong Kong Special Administrative Region, China, through Project HKU 7156/09E.-
dc.languageengen_US
dc.publisherAmerican Astronomical Society. The Journal's web site is located at http://www.aas.org/publications/baas/baas.htmlen_US
dc.relation.ispartofBulletin of the American Astronomical Societyen_US
dc.rightsBulletin of the American Astronomical Society. Copyright © American Astronomical Society.-
dc.titleEffect of wall pattern configurations on Stokes flow through a microchannel with superhydrophobic slipen_US
dc.typeConference_Paperen_US
dc.identifier.emailNg, CO: cong@hku.hken_US
dc.identifier.authorityNg, CO=rp00224en_US
dc.identifier.hkuros183649en_US
dc.identifier.volume55-
dc.identifier.issue16-
dc.publisher.placeUnited Statesen_US

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