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dc.contributor.authorJofre Cruanyes, Lluís
dc.contributor.authorBalcázar Arciniega, Néstor
dc.contributor.authorLehmkuhl Barba, Oriol
dc.contributor.authorBorrell Pol, Ricard
dc.contributor.authorCastro González, Jesús
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament de Màquines i Motors Tèrmics
dc.date.accessioned2015-03-20T13:21:20Z
dc.date.created2014
dc.date.issued2014
dc.identifier.citationJofre, L. [et al.]. Direct numerical simulation of the flow over a spherical bubble in a turbulent pipe flow. A: European Conference on Computational Fluid Dynamics. "11th World Congress on Computational Mechanics (WCCM XI); 5th European Conference on Computational Mechanics (ECCM V); 6th European Conference on Computational Fluid Dynamics (ECFD VI): all sessions and papers; July 20-25, 2014, Barcelona, Spain". Barcelona: International Association for Computational Mechanics (IACM), 2014, p. 5333-5343.
dc.identifier.urihttp://hdl.handle.net/2117/26896
dc.description.abstractThis work aims at investigating, by means of a direct numerical simulation, the flow over a clean spherical bubble fixed on the axis of a turbulent pipe flow. The simulation is performed by means of a parallel unstructured symmetry-preserving formulation on a mesh of 5.4M cells. The main features of the turbulent flow are described by analyzing the time-averaged data collected over a significant period of time. The numerical results conclude that the bubble generates a wake, similarly to the case of a solid sphere, however, it differs in the fact that the fluid slips through the surface of the bubble instead of stopping, thus, no boundary layer is created. Moreover, due to viscosity, a transfer of momentum from the fluid surrounding the bubble to the fluid inside of it is produced. This transfer of momentum generates a turbulent toroidal vortex inside the bubble. In consequence, two short recirculation zones are found at the extremes of the bubble’s diameter, while in between, the axial velocity inverts its sign.
dc.format.extent11 p.
dc.language.isoeng
dc.publisherInternational Association for Computational Mechanics (IACM)
dc.subjectÀrees temàtiques de la UPC::Enginyeria mecànica::Mecànica de fluids
dc.subject.lcshTurbulence
dc.subject.lcshFluid dynamics--Mathematical models
dc.subject.otherBubble
dc.subject.otherDNS
dc.subject.otherMultiphase
dc.subject.otherTurbulence
dc.subject.otherPipe flow
dc.titleDirect numerical simulation of the flow over a spherical bubble in a turbulent pipe flow
dc.typeConference report
dc.subject.lemacTurbulència
dc.subject.lemacDinàmica de fluids--Models matemàtics
dc.contributor.groupUniversitat Politècnica de Catalunya. CTTC - Centre Tecnològic de la Transferència de Calor
dc.description.peerreviewedPeer Reviewed
dc.relation.publisherversionhttp://www.wccm-eccm-ecfd2014.org/frontal/Ebook.asp
dc.rights.accessRestricted access - publisher's policy
local.identifier.drac15517816
dc.description.versionPostprint (published version)
dc.date.lift10000-01-01
local.citation.authorJofre, L.; Balcazar, N.; Lehmkuhl, O.; Borrell, R.; Castro, J.
local.citation.contributorEuropean Conference on Computational Fluid Dynamics
local.citation.pubplaceBarcelona
local.citation.publicationName11th World Congress on Computational Mechanics (WCCM XI); 5th European Conference on Computational Mechanics (ECCM V); 6th European Conference on Computational Fluid Dynamics (ECFD VI): all sessions and papers; July 20-25, 2014, Barcelona, Spain
local.citation.startingPage5333
local.citation.endingPage5343


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