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Spectrally-consistent regularization modeling at very high Rayleigh numbers
dc.contributor.author | Trias Miquel, Francesc Xavier |
dc.contributor.author | Gorobets, Andrei |
dc.contributor.author | Verstappen, R.W.C.P. |
dc.contributor.author | Oliva Llena, Asensio |
dc.contributor.other | Universitat Politècnica de Catalunya. Departament de Màquines i Motors Tèrmics |
dc.date.accessioned | 2013-01-18T15:42:27Z |
dc.date.created | 2012 |
dc.date.issued | 2012 |
dc.identifier.citation | Trias, 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.isbn | 978-1-56700-301-7 |
dc.identifier.uri | http://hdl.handle.net/2117/17429 |
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-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.iso | eng |
dc.publisher | Begell House |
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 at very high Rayleigh numbers |
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=b1301001~S1*cat |
dc.rights.access | Restricted access - publisher's policy |
local.identifier.drac | 11090109 |
dc.description.version | Postprint (published version) |
dc.date.lift | 10000-01-01 |
local.citation.author | Trias, F. X.; Gorobets, A.; Verstappen, R.W.C.P.; Oliva, A. |
local.citation.contributor | International Symposium on Turbulence, Heat and Mass Transfer |
local.citation.pubplace | Palermo, Sicília |
local.citation.publicationName | Turbulence, heat and mass transfer: proceedings of the 7th International Symposium on Turbulence, Heat and Mass Transfer 2012 |