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Enhanced Microfluidic Mixing via a Tricritical Spiral Vortex Instability

2015-09-03Journal article Open access
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dc.contributor.authorHaward, Simon J.
dc.contributor.authorPoole, R. J.
dc.contributor.authorAlves, M. A.
dc.contributor.authorOliveira, Paulo J.
dc.contributor.authorGoldenfeld, Nigel
dc.contributor.authorShen, Amy Q.
dc.date.accessioned2021-01-20T15:33:33Z
dc.date.available2021-01-20T15:33:33Z
dc.date.issued2015-09-03
dc.description.abstractExperimental measurements and numerical simulations are made on fluid flow through cross-slot devices with a range of aspect (depth:width) ratios, 0.4 < alpha < 3.87. For low Reynolds numbers Re, the flow is symmetric and a sharp boundary exists between fluid streams entering the cross-slot from opposite directions. Above an alpha-dependent critical value Re_c, the flow undergoes a symmetry-breaking bifurcation (though remains steady and laminar) and a spiral vortex structure develops about the central axis of the outflow channel. An order parameter characterizing the instability grows according to a sixth-order Landau potential, and shows a progression from second order to first order transitions as alpha increases. A tricritical point occurs for alpha ~ 0.55. The spiral vortex acts as a mixing region in the flow field and this phenomenon can be used to drive enhanced mixing in microfluidic devices.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.doi10.1103/PhysRevE.93.031101pt_PT
dc.identifier.urihttp://hdl.handle.net/10400.6/11048
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectSpiral vortex formationpt_PT
dc.subjectFlow instabilitypt_PT
dc.subjectCross-slotpt_PT
dc.subjectNewtonian flowpt_PT
dc.titleEnhanced Microfluidic Mixing via a Tricritical Spiral Vortex Instabilitypt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.issue3pt_PT
oaire.citation.startPage031101pt_PT
oaire.citation.titlePhys. Rev. E 93, 031101 (2016)pt_PT
oaire.citation.volume93pt_PT
person.familyNamePoole
person.familyNameAlves
person.familyNameOliveira
person.givenNameRobert
person.givenNameManuel
person.givenNamePaulo J.
person.identifier.ciencia-id3810-FB97-01DB
person.identifier.ciencia-id7A15-7012-C5DF
person.identifier.orcid0000-0001-6686-4301
person.identifier.orcid0000-0001-6585-6609
person.identifier.orcid0000-0001-9843-7558
person.identifier.ridB-7960-2008
person.identifier.ridA-9394-2008
person.identifier.ridA-4638-2009
person.identifier.scopus-author-id7102334697
person.identifier.scopus-author-id26040459500
person.identifier.scopus-author-id24280605700
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublication8354a555-8319-44e6-95e0-4ca1fc7db4dd
relation.isAuthorOfPublication9e511d49-3b72-4ce7-9325-428c59118015
relation.isAuthorOfPublicationf4a5da68-73fb-4a8b-9418-669d76d75f39
relation.isAuthorOfPublication.latestForDiscovery8354a555-8319-44e6-95e0-4ca1fc7db4dd

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