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Article: How does wall slippage affect hydrodynamic dispersion?

TitleHow does wall slippage affect hydrodynamic dispersion?
Authors
KeywordsBoundary slip
Microchannel flow
Residence time distribution
Taylor dispersion
Issue Date2011
PublisherSpringer Verlag. The Journal's web site is located at http://www.springeronline.com/sgw/cda/frontpage/0,11855,5-10027-70-28985103-0,00.html
Citation
Microfluidics And Nanofluidics, 2011, v. 10 n. 1, p. 47-57 How to Cite?
AbstractHow hydrodynamic dispersion is affected by wall slip remains to be fully understood. An attempt is made in this article looking into this issue for dispersion in some elementary pressure-driven flows. Both the long-time Taylor-Aris dispersion and the early-phase convection-dominated dispersion are investigated, analytically and numerically, respectively. The mean and the variance of the residence time distribution are also examined. In the basic case where the walls of a parallel-plate channel have equal slip lengths, the slip is in general to reduce the spread of a solute cloud in a finite channel by either increasing the convection speed or decreasing the dispersivity. However, the decreasing effect of slip on dispersion can be diminished or even reversed by unequal slip lengths and/or phase exchange with the wall. The convection-dominated regime is investigated, following a recently proposed transport-based method, to determine how the mean residence time and variance of elution profiles may change with axial positions depending on the slip. © 2010 The Author(s).
Persistent Identifierhttp://hdl.handle.net/10722/133794
ISSN
2015 Impact Factor: 2.537
2015 SCImago Journal Rankings: 0.852
ISI Accession Number ID
Funding AgencyGrant Number
Research Grants Council of the Hong Kong Special Administrative Region, ChinaHKU 715609E
University of Hong Kong200807176081
Funding Information:

The study was supported by the Research Grants Council of the Hong Kong Special Administrative Region, China, through Project No. HKU 715609E, and also by the University of Hong Kong through the Small Project Funding Scheme under Project Code 200807176081. Useful comments by the reviewers are gratefully acknowledged.

References
Grants

 

DC FieldValueLanguage
dc.contributor.authorNg, COen_HK
dc.date.accessioned2011-05-31T07:12:59Z-
dc.date.available2011-05-31T07:12:59Z-
dc.date.issued2011en_HK
dc.identifier.citationMicrofluidics And Nanofluidics, 2011, v. 10 n. 1, p. 47-57en_HK
dc.identifier.issn1613-4982en_HK
dc.identifier.urihttp://hdl.handle.net/10722/133794-
dc.description.abstractHow hydrodynamic dispersion is affected by wall slip remains to be fully understood. An attempt is made in this article looking into this issue for dispersion in some elementary pressure-driven flows. Both the long-time Taylor-Aris dispersion and the early-phase convection-dominated dispersion are investigated, analytically and numerically, respectively. The mean and the variance of the residence time distribution are also examined. In the basic case where the walls of a parallel-plate channel have equal slip lengths, the slip is in general to reduce the spread of a solute cloud in a finite channel by either increasing the convection speed or decreasing the dispersivity. However, the decreasing effect of slip on dispersion can be diminished or even reversed by unequal slip lengths and/or phase exchange with the wall. The convection-dominated regime is investigated, following a recently proposed transport-based method, to determine how the mean residence time and variance of elution profiles may change with axial positions depending on the slip. © 2010 The Author(s).en_HK
dc.languageengen_US
dc.publisherSpringer Verlag. The Journal's web site is located at http://www.springeronline.com/sgw/cda/frontpage/0,11855,5-10027-70-28985103-0,00.htmlen_HK
dc.relation.ispartofMicrofluidics and Nanofluidicsen_HK
dc.rightsThe Author(s)-
dc.rightsThe original publication is available at www.springerlink.comen_US
dc.subjectBoundary slipen_HK
dc.subjectMicrochannel flowen_HK
dc.subjectResidence time distributionen_HK
dc.subjectTaylor dispersionen_HK
dc.titleHow does wall slippage affect hydrodynamic dispersion?en_HK
dc.typeArticleen_HK
dc.identifier.emailNg, CO:cong@hku.hken_HK
dc.identifier.authorityNg, CO=rp00224en_HK
dc.description.naturepublished_or_final_version-
dc.identifier.doi10.1007/s10404-010-0645-9en_HK
dc.identifier.scopuseid_2-s2.0-79551471128en_HK
dc.identifier.hkuros184091-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-79551471128&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume10en_HK
dc.identifier.issue1en_HK
dc.identifier.spage47en_HK
dc.identifier.epage57en_HK
dc.identifier.eissn1613-4990en_US
dc.identifier.isiWOS:000286199700004-
dc.publisher.placeGermanyen_HK
dc.description.otherSpringer Open Choice, 31 May 2011en_US
dc.relation.projectA homogenization-based model for roughness-induced apparent slip-
dc.identifier.scopusauthoridNg, CO=7401705594en_HK
dc.identifier.citeulike7375005-

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