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Article: Dispersion due to electroosmotic flow in a circular microchannel with slowly varying wall potential and hydrodynamic slippage

TitleDispersion due to electroosmotic flow in a circular microchannel with slowly varying wall potential and hydrodynamic slippage
Authors
KeywordsChannel radius
Channel wall
Circular channels
Circular microchannel
Combined effect
Issue Date2012
PublisherAmerican Institute of Physics. The Journal's web site is located at http://ojps.aip.org/phf
Citation
Physics of Fluids, 2012, v. 24 n. 11, p. 112002-1-112002-16 How to Cite?
AbstractAn analysis using the lubrication approximation is performed for the dispersion of a neutral non-reacting solute due to electro-osmotic flow through a circular channel under the combined effects of longitudinal non-uniformity of potential and hydrodynamic slippage on the channel wall. The wall is periodically patterned for the charge and slip distributions, with a wavelength much longer than the channel radius. It is shown that the presence of slip can greatly amplify the increased dispersion caused by induced pressure gradient brought about by the non-uniformity of wall potential. Non-uniform wall potential interacting with non-uniform slip can give rise to effects much different from those when the potential and slip are both uniformly distributed and equal to the averages of the non-uniform distributions. Mobility and dispersion associated with recirculating flow resulting from oppositely charged slipping region is also examined. © 2012 American Institute of Physics.
Persistent Identifierhttp://hdl.handle.net/10722/180144
ISSN
2015 Impact Factor: 2.017
2015 SCImago Journal Rankings: 1.036
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorNg, COen_US
dc.contributor.authorZhou, Qen_US
dc.date.accessioned2013-01-21T01:30:18Z-
dc.date.available2013-01-21T01:30:18Z-
dc.date.issued2012en_US
dc.identifier.citationPhysics of Fluids, 2012, v. 24 n. 11, p. 112002-1-112002-16en_US
dc.identifier.issn1070-6631-
dc.identifier.urihttp://hdl.handle.net/10722/180144-
dc.description.abstractAn analysis using the lubrication approximation is performed for the dispersion of a neutral non-reacting solute due to electro-osmotic flow through a circular channel under the combined effects of longitudinal non-uniformity of potential and hydrodynamic slippage on the channel wall. The wall is periodically patterned for the charge and slip distributions, with a wavelength much longer than the channel radius. It is shown that the presence of slip can greatly amplify the increased dispersion caused by induced pressure gradient brought about by the non-uniformity of wall potential. Non-uniform wall potential interacting with non-uniform slip can give rise to effects much different from those when the potential and slip are both uniformly distributed and equal to the averages of the non-uniform distributions. Mobility and dispersion associated with recirculating flow resulting from oppositely charged slipping region is also examined. © 2012 American Institute of Physics.-
dc.languageengen_US
dc.publisherAmerican Institute of Physics. The Journal's web site is located at http://ojps.aip.org/phfen_US
dc.relation.ispartofPhysics of Fluidsen_US
dc.rightsPhysics of Fluids. Copyright © American Institute of Physics.-
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.subjectChannel radius-
dc.subjectChannel wall-
dc.subjectCircular channels-
dc.subjectCircular microchannel-
dc.subjectCombined effect-
dc.titleDispersion due to electroosmotic flow in a circular microchannel with slowly varying wall potential and hydrodynamic slippageen_US
dc.typeArticleen_US
dc.identifier.emailNg, CO: cong@hku.hken_US
dc.identifier.emailZhou, Q: lycezqwd@hku.hk-
dc.identifier.authorityNg, CO=rp00224en_US
dc.description.naturepublished_or_final_version-
dc.identifier.doi10.1063/1.4766598-
dc.identifier.scopuseid_2-s2.0-84872422262-
dc.identifier.hkuros213018en_US
dc.identifier.volume24en_US
dc.identifier.issue11en_US
dc.identifier.spage112002-1en_US
dc.identifier.epage112002-16en_US
dc.identifier.isiWOS:000312033200005-
dc.publisher.placeUnited States-

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