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dc.contributor.authorKizildag, Deniz
dc.contributor.authorTrias Miquel, Francesc Xavier
dc.contributor.authorRodríguez Pérez, Ivette María
dc.contributor.authorOliva Llena, Asensio
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament de Màquines i Motors Tèrmics
dc.identifier.citationKizildag, D. [et al.]. Large eddy and direct numerical simulations of a turbulent water-filled differentially heated cavity of aspect ratio 5. "International journal of heat and mass transfer", 01 Octubre 2014, vol. 77, p. 1084-1094.
dc.description.abstractNatural convection in a differentially heated cavity is characterized by different phenomena such as laminar to turbulent flow transition in the boundary layer, turbulent mixing, and thermal stratification in the core of the cavity. In order to predict the thermal and fluid dynamic behavior of the flow in these cavities, the location of transition to turbulence should be accurately determined. In this work, the performance of three subgrid-scale (SGS) models is submitted to investigation in a water-filled cavity of aspect ratio 5 at Rayleigh number Ra=3e11. To do so, the models are compared with the solution obtained by means of direct numerical simulation. The models tested are: (i) the wall-adapting local-eddy viscosity (WALE) model, (ii) the QR model, (iii) the WALE model within a variational multiscale framework (VMS-WALE). It has been shown that the VMS-WALE and WALE models perform better in estimating the location of transition to turbulence, and thus their overall behavior is more accurate than the QR model. The results have also revealed that the use of SGS models is justified in this flow as the transition location and consequently the flow structure cannot be captured properly if no model is used for the tested spatial resolution.
dc.format.extent11 p.
dc.subjectÀrees temàtiques de la UPC::Enginyeria mecànica::Mecànica de fluids
dc.subject.lcshFluid dynamics
dc.subject.lcshSimulation methods
dc.subject.lcshHeat -- Convection
dc.subject.otherDifferentially heated cavity
dc.subject.otherNatural convection
dc.subject.otherLarge-eddy simulation
dc.subject.otherDirect numerical simulations
dc.titleLarge eddy and direct numerical simulations of a turbulent water-filled differentially heated cavity of aspect ratio 5
dc.subject.lemacDinàmica de fluids
dc.subject.lemacSimulació, Mètodes de
dc.subject.lemacCalor -- Convecció
dc.contributor.groupUniversitat Politècnica de Catalunya. CTTC - Centre Tecnològic de la Transferència de Calor
dc.description.peerreviewedPeer Reviewed
dc.rights.accessOpen Access
upcommons.citation.authorKizildag, D.; Trias, F. X.; Rodriguez, I.; Oliva, A.
upcommons.citation.publicationNameInternational journal of heat and mass transfer

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