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Turbulent flow in a differentially heated cavity: direct numérical simulation and regularization modeling
dc.contributor.author | Trias Miquel, Francesc Xavier |
dc.contributor.author | Gorobets, Andrei |
dc.contributor.author | Oliva Llena, Asensio |
dc.contributor.author | Verstappen, R.W.C.P. |
dc.contributor.other | Universitat Politècnica de Catalunya. Departament de Màquines i Motors Tèrmics |
dc.date.accessioned | 2011-03-28T12:58:56Z |
dc.date.available | 2011-03-28T12:58:56Z |
dc.date.created | 2010 |
dc.date.issued | 2010 |
dc.identifier.citation | Trias, F. [et al.]. Turbulent flow in a differentially heated cavity: direct numérical simulation and regularization modeling. A: International Heat Transfer Conference. "14th International Heat Transfer Conference". Washington, DC: 2010, p. 1-10. |
dc.identifier.isbn | 9780791838792 |
dc.identifier.uri | http://hdl.handle.net/2117/12113 |
dc.description.abstract | We consider regularizations of the convective term that preserve symmetry and conservation properties exactly. This yields a novel class of regularizations that restrain the convective production of small scales in an unconditionally stable manner Numerically, one of the most critical issues is the discrete filtering; properties required are, in general, not preserved by classical LES filters. Alternatively, here we propose to construct filters with the general form F = I + ΣMm =1 dm ˜Dm where ˜D is the discrete diffusive operator. Then, the coefficients, dm, follow from the requirement that, at the smallest grid scale kc, the damping effect to the wavevector-triple (kc, p,kc− p) interactions must be virtually independent of the p-th Fourier-mode. This allows an optimal control of the subtle balance between convection and diffusion to stop the vortex-stretching. Finally, the proposed method is tested for an air-filled differentially heated cavity of aspect ratio 4 by direct comparison with DNS reference results. |
dc.format.extent | 10 p. |
dc.language.iso | eng |
dc.subject | Àrees temàtiques de la UPC::Física::Termodinàmica::Física de la transmissió de la calor |
dc.subject.lcsh | Turbulent flows |
dc.title | Turbulent flow in a differentially heated cavity: direct numérical simulation and regularization modeling |
dc.type | Conference lecture |
dc.subject.lemac | Fluids -- Models matemàtics |
dc.contributor.group | Universitat Politècnica de Catalunya. CTTC - Centre Tecnològic de la Transferència de Calor |
dc.relation.publisherversion | http://www.asmeconferences.org/IHTC14/index.cfm |
dc.rights.access | Restricted access - publisher's policy |
local.identifier.drac | 5310612 |
dc.description.version | Postprint (published version) |
local.citation.author | Trias, F.; Gorobets, A.; Oliva, A.; Verstappen, R. |
local.citation.contributor | International Heat Transfer Conference |
local.citation.pubplace | Washington, DC |
local.citation.publicationName | 14th International Heat Transfer Conference |
local.citation.startingPage | 1 |
local.citation.endingPage | 10 |