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Building proper invariants for subgrid-scale eddy-viscosity models
dc.contributor.author | Trias Miquel, Francesc Xavier |
dc.contributor.author | Folch, David |
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 | 2017-04-07T13:08:28Z |
dc.date.issued | 2015 |
dc.identifier.citation | Trias, F. X., Folch, D., Gorobets, A., Oliva, A. Building proper invariants for subgrid-scale eddy-viscosity models. A: European Turbulence Conference. "15th European Turbulence Conference 2015, August 25-28th, 2015, Delft, The Netherlands: proceedings". Delft: 2015. |
dc.identifier.uri | http://hdl.handle.net/2117/103455 |
dc.description.abstract | Since direct simulations of the incompressible Navier-Stokes equations are limited to relatively low-Reynolds numbers, dynamically less complex mathematical formulations are necessary for coarse-grain simulations. Eddy-viscosity models for Large-Eddy Simulation is probably the most popular example thereof: they rely on differential operators that should be able to capture well different flow configurations (laminar and 2D flows, near-wall behavior, transitional regime...). Most of them are based on the combination of invariants of a symmetric second-order tensor that is derived from the gradient of the resolved velocity field. In the present work, they are presented in a framework where all the models are represented as a combination of elements of a 5D phase space of invariants. In this way, new models can be constructed by imposing appropriate restrictions in this space. The performance of the proposed models is successfully tested for a turbulent channel flow. |
dc.language.iso | eng |
dc.subject | Àrees temàtiques de la UPC::Enginyeria mecànica::Mecànica de fluids |
dc.subject.lcsh | Turbulence--Mathematical models |
dc.title | Building proper invariants for subgrid-scale eddy-viscosity models |
dc.type | Conference report |
dc.subject.lemac | Turbulència -- Simulació numèrica |
dc.contributor.group | Universitat Politècnica de Catalunya. CTTC - Centre Tecnològic de la Transferència de Calor |
dc.description.peerreviewed | Peer Reviewed |
dc.rights.access | Restricted access - publisher's policy |
local.identifier.drac | 17513231 |
dc.description.version | Postprint (published version) |
dc.relation.projectid | info:eu-repo/grantAgreement/MINECO//ENE2014-60577-R/ES/DESARROLLO DE CODIGOS Y ALGORITMOS PARALELOS DE ALTAS PRESTACIONES PARA LA MEJORA DE LA EFICIENCIA EN LOS SECTORES EOLICO, SOLARTERMICO Y EDIFICACION/ |
dc.date.lift | 10000-01-01 |
local.citation.author | Trias, F. X.; Folch, D.; Gorobets, A.; Oliva, A. |
local.citation.contributor | European Turbulence Conference |
local.citation.pubplace | Delft |
local.citation.publicationName | 15th European Turbulence Conference 2015, August 25-28th, 2015, Delft, The Netherlands: proceedings |