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Article: Density-induced asymmetric pair of Dean vortices and its effects on mass transfer in a curved microchannel with two-layer laminar stream

TitleDensity-induced asymmetric pair of Dean vortices and its effects on mass transfer in a curved microchannel with two-layer laminar stream
Authors
KeywordsComputational fluid dynamics
Dean vortices
Microchannel
Two-layer laminar flow
Issue Date2011
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/cej
Citation
Chemical Engineering Journal, 2011, v. 171 n. 1, p. 216-223 How to Cite?
AbstractTo better understand the mass transfer and provide possible performance improvement methods for the microfluidic devices relying on the two-layer laminar flow, a computational fluid dynamics simulation is performed to investigate the phenomenon of a two-layer laminar stream passing through a curved microchannel. The results show that due to the density difference between the two fluids, asymmetric pair of Dean vortices are formed as the fluids pass through the curve. Due to the inter-stream convection, the denser fluid intrudes into the less-dense one resulting in a Γ sharp layer-interface. Furthermore, the parametric analysis helps identify ways to minimize the inter-stream mass transfer, such as increasing the density ratio, as well as reducing the Re number and aspect ratio. The study concludes that the microchannel curve can be properly designed to obtain a clear interface between two streams to fulfill the basic requirement of microfluidic devices. © 2011 Elsevier B.V.
Persistent Identifierhttp://hdl.handle.net/10722/157119
ISSN
2015 Impact Factor: 5.31
2015 SCImago Journal Rankings: 1.743
ISI Accession Number ID
Funding AgencyGrant Number
The University of Hong Kong
Funding Information:

The work presented in this paper was supported by a UDF grant by The University of Hong Kong.

References

 

DC FieldValueLanguage
dc.contributor.authorXuan, Jen_HK
dc.contributor.authorLeung, MKHen_HK
dc.contributor.authorLeung, DYCen_HK
dc.contributor.authorNi, Men_HK
dc.date.accessioned2012-08-08T08:45:25Z-
dc.date.available2012-08-08T08:45:25Z-
dc.date.issued2011en_HK
dc.identifier.citationChemical Engineering Journal, 2011, v. 171 n. 1, p. 216-223en_HK
dc.identifier.issn1385-8947en_HK
dc.identifier.urihttp://hdl.handle.net/10722/157119-
dc.description.abstractTo better understand the mass transfer and provide possible performance improvement methods for the microfluidic devices relying on the two-layer laminar flow, a computational fluid dynamics simulation is performed to investigate the phenomenon of a two-layer laminar stream passing through a curved microchannel. The results show that due to the density difference between the two fluids, asymmetric pair of Dean vortices are formed as the fluids pass through the curve. Due to the inter-stream convection, the denser fluid intrudes into the less-dense one resulting in a Γ sharp layer-interface. Furthermore, the parametric analysis helps identify ways to minimize the inter-stream mass transfer, such as increasing the density ratio, as well as reducing the Re number and aspect ratio. The study concludes that the microchannel curve can be properly designed to obtain a clear interface between two streams to fulfill the basic requirement of microfluidic devices. © 2011 Elsevier B.V.en_HK
dc.languageengen_US
dc.publisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/cejen_HK
dc.relation.ispartofChemical Engineering Journalen_HK
dc.subjectComputational fluid dynamicsen_HK
dc.subjectDean vorticesen_HK
dc.subjectMicrochannelen_HK
dc.subjectTwo-layer laminar flowen_HK
dc.titleDensity-induced asymmetric pair of Dean vortices and its effects on mass transfer in a curved microchannel with two-layer laminar streamen_HK
dc.typeArticleen_HK
dc.identifier.emailLeung, MKH:en_HK
dc.identifier.emailLeung, DYC: ycleung@hku.hken_HK
dc.identifier.authorityLeung, MKH=rp00148en_HK
dc.identifier.authorityLeung, DYC=rp00149en_HK
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1016/j.cej.2011.01.011en_HK
dc.identifier.scopuseid_2-s2.0-79957603188en_HK
dc.identifier.hkuros200077-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-79957603188&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume171en_HK
dc.identifier.issue1en_HK
dc.identifier.spage216en_HK
dc.identifier.epage223en_HK
dc.identifier.isiWOS:000292075000025-
dc.publisher.placeNetherlandsen_HK
dc.identifier.scopusauthoridXuan, J=25722402300en_HK
dc.identifier.scopusauthoridLeung, MKH=8862966600en_HK
dc.identifier.scopusauthoridLeung, DYC=7203002484en_HK
dc.identifier.scopusauthoridNi, M=9268339800en_HK

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