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dc.contributor.authorLehmkuhl Barba, Oriol
dc.contributor.authorChrysokentis, Georgios
dc.contributor.authorGomez, Samuel
dc.contributor.authorOwen, Herbert
dc.contributor.otherBarcelona Supercomputing Center
dc.date.accessioned2018-10-04T14:48:23Z
dc.date.available2018-10-04T14:48:23Z
dc.date.issued2018-07-09
dc.identifier.citationLehmkuhl, O. [et al.]. Large eddy simulation for automotive aerodynamics with Alya. A: Tenth International Conference on Computational Fluid Dynamics (ICCFD10), Barcelona,Spain, July 9-13, 2018. "". Barcelona: 2018, p. 1-11.
dc.identifier.urihttp://hdl.handle.net/2117/121898
dc.description.abstractThe prodigious potential offered by the ever-growing computing infrastructure is fostering the use of large eddy simulation for automotive aerodynamics. This approach, which resolves the larger dynamically important eddies and models only the smaller ones, provides significant improvement over RANS when there are important separated regions or transient phenomena such as noise generation. In the search for high fidelity LES solution Alya has recently undergone a significant transformation departing from the use of the Variational Multiscale approach and implicit temporal discretization. Nowadays, Alya has switched to an explicit temporal discretization, without any stabilization other than the pressure stabilization introduced by the fractional step scheme. When using a energy conserving discretization for the convective term together with an explicit turbulent model, numerical stabilization of the convective term in the Navier Stokes equations is not needed. The Vreman turbulence model is used in this work. For the simulation of high Reynolds number turbulent flows, such as those encountered in automotive applications, the use of wall modeling is mandatory with current computational resources. Significant improvements in the implementation of wall modeling for finite element methods proposed recently are tested in this work for highly complex geometries. Comparison of the numerical results for both the Ahmed and DrivAer bodies against experimental results from the literature shows that Alya can provide very accurate results.
dc.format.extent11 p.
dc.language.isoeng
dc.subjectÀrees temàtiques de la UPC::Enginyeria mecànica
dc.subject.lcshAerodynamics--Computer programs
dc.subject.otherAlya
dc.subject.otherComputing infrastructure
dc.titleLarge eddy simulation for automotive aerodynamics with Alya
dc.typeConference lecture
dc.subject.lemacAerodinàmica
dc.relation.publisherversionhttp://www.iccfd.org/iccfd10/papers/ICCFD10-341-Paper.pdf
dc.rights.accessOpen Access
dc.description.versionPostprint (author's final draft)
dc.relation.projectidinfo:eu-repo/grantAgreement/EC/H2020/676629/EU/Energy oriented Centre of Excellence for computer applications/EoCoE
local.citation.contributorTenth International Conference on Computational Fluid Dynamics (ICCFD10), Barcelona,Spain, July 9-13, 2018
local.citation.pubplaceBarcelona
local.citation.startingPage1
local.citation.endingPage11


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