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dc.contributor.authorLi, Haiwang
dc.contributor.authorWong, Teck Neng
dc.contributor.authorNam-Trung, Nguyen
dc.contributor.editorW. Minkowycz
dc.date.accessioned2017-05-03T16:14:34Z
dc.date.available2017-05-03T16:14:34Z
dc.date.issued2012
dc.date.modified2013-03-27T22:55:38Z
dc.identifier.issn0017-9310
dc.identifier.doi10.1016/j.ijheatmasstransfer.2012.07.012
dc.identifier.urihttp://hdl.handle.net/10072/50013
dc.description.abstractThis paper investigates analytically and experimentally electrohydrodynamic instability of the interface between two viscous fluids with different electrical properties under constant flow rates in a microchannel. In the three-dimensional analytical model, the two-layer system is subjected to an electric field normal to the interface between the two fluids. There is no assumption on the magnitude of the ratio of fluid to electric time scales, and thus the linear Poisson-Boltzmann equation are solved using separation of variable method for densities of bulk charge and surface charge. The electric field and fluid dynamics are coupled only at the interface through the tangential and normal interfacial stress balance equations. In the experiments, two immiscible fluids, aqueous NaHCO3 (the high electrical mobility fluid) and silicone oil (polydimethylsiloxane, the low electrical mobility fluid) are pumped into a microchannel made in polymethyl methacrylate) (PMMA) substrate. The normal electric field is added using a high voltage power supply. The results showed that the external electric field and increasing width of microchannel destabilize the interface between the immiscible fluids. At the same time, the viscosity of the high electrical mobility fluid and flow rates of fluids has a stabilizing effect. The experimental results and the analytical results show a reasonable agreement.
dc.description.peerreviewedYes
dc.description.publicationstatusYes
dc.format.extent1953914 bytes
dc.format.mimetypeapplication/pdf
dc.languageEnglish
dc.language.isoeng
dc.publisherElsevier
dc.publisher.placeUnited Kingdom
dc.relation.ispartofstudentpublicationY
dc.relation.ispartofpagefrom6994
dc.relation.ispartofpageto7004
dc.relation.ispartofissue23-24
dc.relation.ispartofjournalInternational Journal of Heat and Mass Transfer
dc.relation.ispartofvolume55
dc.rights.retentionY
dc.subject.fieldofresearchFluid Physics
dc.subject.fieldofresearchMicroelectromechanical Systems (MEMS)
dc.subject.fieldofresearchMathematical Sciences
dc.subject.fieldofresearchPhysical Sciences
dc.subject.fieldofresearchEngineering
dc.subject.fieldofresearchcode020303
dc.subject.fieldofresearchcode091306
dc.subject.fieldofresearchcode01
dc.subject.fieldofresearchcode02
dc.subject.fieldofresearchcode09
dc.titleInstability of pressure driven viscous fluid streams in a microchannel under a normal electric field
dc.typeJournal article
dc.type.descriptionC1 - Articles
dc.type.codeC - Journal Articles
gro.rights.copyright© 2012 Elsevier Inc. This is the author-manuscript version of this paper. Reproduced in accordance with the copyright policy of the publisher. Please refer to the journal's website for access to the definitive, published version.
gro.date.issued2012
gro.hasfulltextFull Text
gro.griffith.authorNguyen, Nam-Trung


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