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Spectrally-consistent regularization modeling of turbulent natural convection flows
dc.contributor.author | Trias Miquel, Francesc Xavier |
dc.contributor.author | Verstappen, R.W.C.P. |
dc.contributor.author | Gorobets, Andrei |
dc.contributor.author | Oliva Llena, Asensio |
dc.contributor.other | Universitat Politècnica de Catalunya. Departament de Màquines i Motors Tèrmics |
dc.date.accessioned | 2013-01-18T16:04:42Z |
dc.date.available | 2013-01-23T17:29:50Z |
dc.date.created | 2012 |
dc.date.issued | 2012 |
dc.identifier.citation | Trias, F. X. [et al.]. Spectrally-consistent regularization modeling of turbulent natural convection flows. A: European Thermal Sciences Conference. "Eurotherm 2012: 6th European Thermal Sciences Conference: September 04-07, 2012, Poitiers, Futuroscope France". Poitiers: Université de Poitiers, 2012. |
dc.identifier.uri | http://hdl.handle.net/2117/17430 |
dc.description.abstract | The incompressible Navier-Stokes equations constitute an excellent mathematical modelization of turbulence. Unfortunately, attempts at performing direct simulations are limited to relatively low-Reynolds 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 terms 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 self-adjoint linear filter whose local filter length is determined from the requirement that vortex-stretching must stop at the smallest grid scale. In the present work, the performance of the above-mentioned recent improvements is assessed through application to turbulent natural convection flows by means of comparison with DNS reference data. |
dc.language.iso | eng |
dc.publisher | Université de Poitiers |
dc.subject | Àrees temàtiques de la UPC::Enginyeria mecànica::Mecànica de fluids |
dc.subject | Àrees temàtiques de la UPC::Aeronàutica i espai::Aerodinàmica |
dc.subject.lcsh | Navier-Stokes equations |
dc.subject.lcsh | Turbulence |
dc.subject.lcsh | Aerodynamics |
dc.subject.lcsh | Fluid mechanics |
dc.title | Spectrally-consistent regularization modeling of turbulent natural convection flows |
dc.type | Conference report |
dc.subject.lemac | Equacions de Navier-Stokes |
dc.subject.lemac | Turbulències |
dc.subject.lemac | Aerodinàmica |
dc.subject.lemac | Mecànica de fluids |
dc.contributor.group | Universitat Politècnica de Catalunya. CTTC - Centre Tecnològic de la Transferència de Calor |
dc.description.peerreviewed | Peer Reviewed |
dc.relation.publisherversion | http://cataleg.upc.edu/record=b1420736~S1*cat |
dc.rights.access | Open Access |
local.identifier.drac | 11090122 |
dc.description.version | Postprint (published version) |
local.citation.author | Trias, F. X.; Verstappen, R.W.C.P.; Gorobets, A.; Oliva, A. |
local.citation.contributor | European Thermal Sciences Conference |
local.citation.pubplace | Poitiers |
local.citation.publicationName | Eurotherm 2012: 6th European Thermal Sciences Conference: September 04-07, 2012, Poitiers, Futuroscope France |