Flow and turbulent structures around simplified car models

External car aerodynamics study has great importance in overall car efficiency and ride stability, being a key element in successful automotive design. The flow over car geometries shows three dimensional and unsteady turbulent characteristics. Additionally, vortex shedding, flow reattachment and re...

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Autores: Aljure Osorio, David E., Lehmkuhl Barba, Oriol|||0000-0002-2670-1871, Rodríguez Pérez, Ivette María|||0000-0002-3749-277X, Oliva Llena, Asensio|||0000-0002-2805-4794
Tipo de recurso: artículo
Fecha de publicación:2014
País:España
Institución:Universitat Politècnica de Catalunya (UPC)
Repositorio:UPCommons. Portal del coneixement obert de la UPC
Idioma:inglés
OAI Identifier:oai:upcommons.upc.edu:2117/23638
Acceso en línea:https://hdl.handle.net/2117/23638
https://dx.doi.org/10.1016/j.compfluid.2014.03.013
Access Level:acceso abierto
Palabra clave:Motor vehicles -- Aerodynamics
Fluid dynamics
Turbulence
Automotive aerodynamics
CFD
Challenging LES
Turbulence models
Variational multiscale method
Large-eddy simulation
Vehicles de motor -- Aerodinàmica
Dinàmica de fluids
Turbulència
Àrees temàtiques de la UPC::Enginyeria mecànica::Disseny i construcció de vehicles::Automòbils
Àrees temàtiques de la UPC::Enginyeria mecànica::Mecànica de fluids
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repository_id_str
spelling Flow and turbulent structures around simplified car modelsAljure Osorio, David E.Lehmkuhl Barba, Oriol|||0000-0002-2670-1871Rodríguez Pérez, Ivette María|||0000-0002-3749-277XOliva Llena, Asensio|||0000-0002-2805-4794Motor vehicles -- AerodynamicsFluid dynamicsTurbulenceAutomotive aerodynamicsCFDChallenging LESTurbulence modelsVariational multiscale methodLarge-eddy simulationVehicles de motor -- AerodinàmicaDinàmica de fluidsTurbulènciaÀrees temàtiques de la UPC::Enginyeria mecànica::Disseny i construcció de vehicles::AutomòbilsÀrees temàtiques de la UPC::Enginyeria mecànica::Mecànica de fluidsExternal car aerodynamics study has great importance in overall car efficiency and ride stability, being a key element in successful automotive design. The flow over car geometries shows three dimensional and unsteady turbulent characteristics. Additionally, vortex shedding, flow reattachment and recirculation bubbles are also found around the bluff body. These phenomena greatly influence the lift and drag coefficients, which are fundamental for ride stability and energy efficiency, respectively. The aim of the present study is focused on the assessment of different LES models (e.g. VMS or SIGMA models), as well as to show their capabilities of capturing the large scale turbulent flow structures in car-like bodies using relative coarse grids. In order to achieve these objectives, the flow around two model car geometries, the Ahmed and the Asmo cars, is simulated. These generic bluff bodies reproduce the basic fluid dynamics features of real cars. First, the flow over both geometries is studied and compared against experimental results to validate the numerical results. Then, different LES models are used to study the flow in detail and compare the structures found in both geometries.Peer ReviewedElsevier20142014-06-1320142014-07-28journal articlehttp://purl.org/coar/resource_type/c_6501AOhttp://purl.org/coar/version/c_b1a7d7d4d402bcceinfo:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/2117/23638https://dx.doi.org/10.1016/j.compfluid.2014.03.013reponame:UPCommons. Portal del coneixement obert de la UPCinstname:Universitat Politècnica de Catalunya (UPC)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2info:eu-repo/semantics/openAccessoai:upcommons.upc.edu:2117/236382026-05-27T15:37:01Z
dc.title.none.fl_str_mv Flow and turbulent structures around simplified car models
title Flow and turbulent structures around simplified car models
spellingShingle Flow and turbulent structures around simplified car models
Aljure Osorio, David E.
Motor vehicles -- Aerodynamics
Fluid dynamics
Turbulence
Automotive aerodynamics
CFD
Challenging LES
Turbulence models
Variational multiscale method
Large-eddy simulation
Vehicles de motor -- Aerodinàmica
Dinàmica de fluids
Turbulència
Àrees temàtiques de la UPC::Enginyeria mecànica::Disseny i construcció de vehicles::Automòbils
Àrees temàtiques de la UPC::Enginyeria mecànica::Mecànica de fluids
title_short Flow and turbulent structures around simplified car models
title_full Flow and turbulent structures around simplified car models
title_fullStr Flow and turbulent structures around simplified car models
title_full_unstemmed Flow and turbulent structures around simplified car models
title_sort Flow and turbulent structures around simplified car models
dc.creator.none.fl_str_mv Aljure Osorio, David E.
Lehmkuhl Barba, Oriol|||0000-0002-2670-1871
Rodríguez Pérez, Ivette María|||0000-0002-3749-277X
Oliva Llena, Asensio|||0000-0002-2805-4794
author Aljure Osorio, David E.
author_facet Aljure Osorio, David E.
Lehmkuhl Barba, Oriol|||0000-0002-2670-1871
Rodríguez Pérez, Ivette María|||0000-0002-3749-277X
Oliva Llena, Asensio|||0000-0002-2805-4794
author_role author
author2 Lehmkuhl Barba, Oriol|||0000-0002-2670-1871
Rodríguez Pérez, Ivette María|||0000-0002-3749-277X
Oliva Llena, Asensio|||0000-0002-2805-4794
author2_role author
author
author
dc.subject.none.fl_str_mv Motor vehicles -- Aerodynamics
Fluid dynamics
Turbulence
Automotive aerodynamics
CFD
Challenging LES
Turbulence models
Variational multiscale method
Large-eddy simulation
Vehicles de motor -- Aerodinàmica
Dinàmica de fluids
Turbulència
Àrees temàtiques de la UPC::Enginyeria mecànica::Disseny i construcció de vehicles::Automòbils
Àrees temàtiques de la UPC::Enginyeria mecànica::Mecànica de fluids
topic Motor vehicles -- Aerodynamics
Fluid dynamics
Turbulence
Automotive aerodynamics
CFD
Challenging LES
Turbulence models
Variational multiscale method
Large-eddy simulation
Vehicles de motor -- Aerodinàmica
Dinàmica de fluids
Turbulència
Àrees temàtiques de la UPC::Enginyeria mecànica::Disseny i construcció de vehicles::Automòbils
Àrees temàtiques de la UPC::Enginyeria mecànica::Mecànica de fluids
description External car aerodynamics study has great importance in overall car efficiency and ride stability, being a key element in successful automotive design. The flow over car geometries shows three dimensional and unsteady turbulent characteristics. Additionally, vortex shedding, flow reattachment and recirculation bubbles are also found around the bluff body. These phenomena greatly influence the lift and drag coefficients, which are fundamental for ride stability and energy efficiency, respectively. The aim of the present study is focused on the assessment of different LES models (e.g. VMS or SIGMA models), as well as to show their capabilities of capturing the large scale turbulent flow structures in car-like bodies using relative coarse grids. In order to achieve these objectives, the flow around two model car geometries, the Ahmed and the Asmo cars, is simulated. These generic bluff bodies reproduce the basic fluid dynamics features of real cars. First, the flow over both geometries is studied and compared against experimental results to validate the numerical results. Then, different LES models are used to study the flow in detail and compare the structures found in both geometries.
publishDate 2014
dc.date.none.fl_str_mv 2014
2014-06-13
2014
2014-07-28
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
AO
http://purl.org/coar/version/c_b1a7d7d4d402bcce
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/2117/23638
https://dx.doi.org/10.1016/j.compfluid.2014.03.013
url https://hdl.handle.net/2117/23638
https://dx.doi.org/10.1016/j.compfluid.2014.03.013
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:UPCommons. Portal del coneixement obert de la UPC
instname:Universitat Politècnica de Catalunya (UPC)
instname_str Universitat Politècnica de Catalunya (UPC)
reponame_str UPCommons. Portal del coneixement obert de la UPC
collection UPCommons. Portal del coneixement obert de la UPC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,301603

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