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Article: Electro-osmotic flow through a thin channel with gradually varying wall potential and hydrodynamic slippage

TitleElectro-osmotic flow through a thin channel with gradually varying wall potential and hydrodynamic slippage
Authors
KeywordsApplied field
Channel height
Combined effect
Convection patterns
Electroosmotic flow
Issue Date2012
PublisherInstitute of Physics Publishing Ltd. The Journal's web site is located at http://www.iop.org/journals/fdr
Citation
Fluid Dynamics Research, 2012, v. 44 n. 5, article no. 055507 How to Cite?
AbstractThe lubrication approximation is applied to electro-osmotic flow through a thin parallel-plate channel under the combined effect of charge and hydrodynamic slippage modulation on the walls. The walls are periodically patterned for the charge and slip distributions, with a wavelength much longer than the channel height. It is shown that the phase of the wall patterns will play a significant role in determining the section-averaged velocity as well as the local convection pattern, both quantitatively and qualitatively. The effect of the phase on the flow will be dramatically different, depending on whether the electric field is applied along or perpendicular to the varying direction of the patterns. The possibility of generating a net flow in a direction perpendicular to the applied field is demonstrated. © 2012 The Japan Society of Fluid Mechanics and IOP Publishing Ltd.
Persistent Identifierhttp://hdl.handle.net/10722/164225
ISSN
2015 Impact Factor: 0.846
2015 SCImago Journal Rankings: 0.463
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorNg, COen_US
dc.contributor.authorZhou, Qen_US
dc.date.accessioned2012-09-20T07:56:42Z-
dc.date.available2012-09-20T07:56:42Z-
dc.date.issued2012en_US
dc.identifier.citationFluid Dynamics Research, 2012, v. 44 n. 5, article no. 055507en_US
dc.identifier.issn0169-5983-
dc.identifier.urihttp://hdl.handle.net/10722/164225-
dc.description.abstractThe lubrication approximation is applied to electro-osmotic flow through a thin parallel-plate channel under the combined effect of charge and hydrodynamic slippage modulation on the walls. The walls are periodically patterned for the charge and slip distributions, with a wavelength much longer than the channel height. It is shown that the phase of the wall patterns will play a significant role in determining the section-averaged velocity as well as the local convection pattern, both quantitatively and qualitatively. The effect of the phase on the flow will be dramatically different, depending on whether the electric field is applied along or perpendicular to the varying direction of the patterns. The possibility of generating a net flow in a direction perpendicular to the applied field is demonstrated. © 2012 The Japan Society of Fluid Mechanics and IOP Publishing Ltd.-
dc.languageengen_US
dc.publisherInstitute of Physics Publishing Ltd. The Journal's web site is located at http://www.iop.org/journals/fdren_US
dc.relation.ispartofFluid Dynamics Researchen_US
dc.rightsFluid Dynamics Research. Copyright © Institute of Physics Publishing Ltd.-
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.subjectApplied field-
dc.subjectChannel height-
dc.subjectCombined effect-
dc.subjectConvection patterns-
dc.subjectElectroosmotic flow-
dc.titleElectro-osmotic flow through a thin channel with gradually varying wall potential and hydrodynamic slippageen_US
dc.typeArticleen_US
dc.identifier.emailNg, CO: cong@hku.hken_US
dc.identifier.authorityNg, CO=rp00224en_US
dc.description.naturepostprint-
dc.identifier.doi10.1088/0169-5983/44/5/055507-
dc.identifier.scopuseid_2-s2.0-84866316622-
dc.identifier.hkuros208149en_US
dc.identifier.volume44en_US
dc.identifier.issue5, article no. 055507en_US
dc.identifier.isiWOS:000308914500007-
dc.publisher.placeUnited Kingdom-

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