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Visualizations of Boger fluid flows in a 4:1 square/square contraction

2005Journal article Open access
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dc.contributor.authorAlves, M. A.
dc.contributor.authorPinho, Fernando
dc.contributor.authorOliveira, Paulo J.
dc.date.accessioned2010-04-28T10:07:14Z
dc.date.available2010-04-28T10:07:14Z
dc.date.issued2005
dc.description.abstractVisualizations of the 3-D flow in a 4:1 square/square sudden contraction for two viscoelastic Boger fluids and two Newtonian fluids were carried out at low Reynolds numbers. In these creeping flow conditions, the vortex length remained unchanged for Newtonian fluids, whereas a nonmonotonic variation with flow rate was observed for the Boger fluids. Initially, the corner vortex slightly increased with flow rate to a local peak at a Deborah number of De=6, before decreasing significantly to a minimum at De=15 (De is based on downstream characteristics). Finally, for Deborah numbers = 20 there was intense vortex enhancement until a periodic flow was established at higher flow rates (De=45/ 52). The strong elastic vortex enhancement was preceded by the appearance of diverging streamlines on the approach flow and, for the Boger fluid with higher polymer concentration, vortex enhancement took place through a lip vortex mechanism.pt
dc.identifier.urihttp://hdl.handle.net/10400.6/594
dc.languageeng
dc.subjectViscoelastic flowpt
dc.subjectBoger fluidpt
dc.subjectDiverging flowpt
dc.subjectVisualizationpt
dc.subject3D contraction flowpt
dc.titleVisualizations of Boger fluid flows in a 4:1 square/square contractionpt
dc.typejournal article
dspace.entity.typePublication
oaire.citation.issueVol. 51, No. 11, pp. 2908-2922pt
oaire.citation.titleAIChE J, Amer. Inst. Chemic. Eng. Journalpt
person.familyNameAlves
person.familyNamePinho
person.familyNameOliveira
person.givenNameManuel
person.givenNameFernando
person.givenNamePaulo J.
person.identifier.ciencia-id3810-FB97-01DB
person.identifier.ciencia-id7A15-7012-C5DF
person.identifier.orcid0000-0001-6585-6609
person.identifier.orcid0000-0002-9576-4622
person.identifier.orcid0000-0001-9843-7558
person.identifier.ridA-9394-2008
person.identifier.ridD-1035-2011
person.identifier.ridA-4638-2009
person.identifier.scopus-author-id26040459500
person.identifier.scopus-author-id7006647306
person.identifier.scopus-author-id24280605700
rcaap.rightsopenAccess
rcaap.typearticlept
relation.isAuthorOfPublication9e511d49-3b72-4ce7-9325-428c59118015
relation.isAuthorOfPublication9933e255-01c8-4867-9506-18a649153d8e
relation.isAuthorOfPublicationf4a5da68-73fb-4a8b-9418-669d76d75f39
relation.isAuthorOfPublication.latestForDiscoveryf4a5da68-73fb-4a8b-9418-669d76d75f39

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