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dc.contributor.authorTrias Miquel, Francesc Xavier
dc.contributor.authorGorobets, Andrei
dc.contributor.authorVerstappen, R.W.C.P.
dc.contributor.authorOliva Llena, Asensio
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament de Màquines i Motors Tèrmics
dc.date.accessioned2013-01-18T15:42:27Z
dc.date.created2012
dc.date.issued2012
dc.identifier.citationTrias, F. X. [et al.]. Spectrally-consistent regularization modeling at very high Rayleigh numbers. A: International Symposium on Turbulence, Heat and Mass Transfer. "Turbulence, heat and mass transfer: proceedings of the 7th International Symposium on Turbulence, Heat and Mass Transfer 2012". Palermo, Sicília: Begell House, 2012.
dc.identifier.isbn978-1-56700-301-7
dc.identifier.urihttp://hdl.handle.net/2117/17429
dc.description.abstractThe incompressible Navier-Stokes equations constitute an excellent mathematical modelization of turbulence. Unfortunately, attempts at performing direct simulations are limited to relatively low-Rayleigh numbers because of the almost numberless small scales produced by the non-linear convective term. Alternatively, a dynamically less complex formulation is proposed here. Namely, regularizations of the Navier-Stokes equations that preserve the symmetry and conservation properties exactly. To do so, both convective and diffusive term are altered in the same vein. In this way, the convective production of small scales is effectively restrained whereas the modified diffusive term introduces a hyperviscosity effect and consequently enhances the destruction of small scales. In practice, the only additional ingredient is a selfadjoint linear filter whose local filter length is determined from the requirement that vortex-stretching must stop at the smallest grid scale. The performance of the novel regularization modeling approach is assessed through application to turbulent natural convection flows at very high Rayleigh numbers
dc.language.isoeng
dc.publisherBegell House
dc.subjectÀrees temàtiques de la UPC::Enginyeria mecànica::Mecànica de fluids
dc.subjectÀrees temàtiques de la UPC::Aeronàutica i espai::Aerodinàmica
dc.subject.lcshNavier-Stokes equations
dc.subject.lcshTurbulence
dc.subject.lcshAerodynamics
dc.subject.lcshFluid mechanics
dc.titleSpectrally-consistent regularization modeling at very high Rayleigh numbers
dc.typeConference report
dc.subject.lemacEquacions de Navier-Stokes
dc.subject.lemacTurbulències
dc.subject.lemacAerodinàmica
dc.subject.lemacMecànica de fluids
dc.contributor.groupUniversitat Politècnica de Catalunya. CTTC - Centre Tecnològic de la Transferència de Calor
dc.description.peerreviewedPeer Reviewed
dc.relation.publisherversionhttp://cataleg.upc.edu/record=b1301001~S1*cat
dc.rights.accessRestricted access - publisher's policy
local.identifier.drac11090109
dc.description.versionPostprint (published version)
dc.date.lift10000-01-01
local.citation.authorTrias, F. X.; Gorobets, A.; Verstappen, R.W.C.P.; Oliva, A.
local.citation.contributorInternational Symposium on Turbulence, Heat and Mass Transfer
local.citation.pubplacePalermo, Sicília
local.citation.publicationNameTurbulence, heat and mass transfer: proceedings of the 7th International Symposium on Turbulence, Heat and Mass Transfer 2012


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