Unified solver for fluid dynamics and aeroacoustics in isentropic gas flows

The high computational cost of solving numerically the fully compressible Navier–Stokes equations, together with the poor performance of most numerical formulations for compressible flow in the low Mach number regime, has led to the necessity for more affordable numerical models for Computational Ae...

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Detalles Bibliográficos
Autores: Pont Ribas, Arnau, Codina, Ramon|||0000-0002-7412-778X, Baiges Aznar, Joan|||0000-0002-3940-5887, Guasch Fortuny, Oriol
Tipo de recurso: artículo
Fecha de publicación:2018
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:2117/115963
Acceso en línea:https://hdl.handle.net/2117/115963
https://dx.doi.org/10.1016/j.jcp.2018.02.029
Access Level:acceso abierto
Palabra clave:Aeroacoustics
Isentropic flow
Computational aeroacoustics
Finite elements
Weak imposition of boundary conditions
Dinàmica de fluids -- Mètodes numèrics
Àrees temàtiques de la UPC::Física::Física de fluids
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spelling Unified solver for fluid dynamics and aeroacoustics in isentropic gas flowsPont Ribas, ArnauCodina, Ramon|||0000-0002-7412-778XBaiges Aznar, Joan|||0000-0002-3940-5887Guasch Fortuny, OriolAeroacousticsIsentropic flowComputational aeroacousticsFinite elementsWeak imposition of boundary conditionsDinàmica de fluids -- Mètodes numèricsÀrees temàtiques de la UPC::Física::Física de fluidsThe high computational cost of solving numerically the fully compressible Navier–Stokes equations, together with the poor performance of most numerical formulations for compressible flow in the low Mach number regime, has led to the necessity for more affordable numerical models for Computational Aeroacoustics. For low Mach number subsonic flows with neither shocks nor thermal coupling, both flow dynamics and wave propagation can be considered isentropic. Therefore, a joint isentropic formulation for flow and aeroacoustics can be devised which avoids the need for segregating flow and acoustic scales. Under these assumptions density and pressure fluctuations are directly proportional, and a two field velocity-pressure compressible formulation can be derived as an extension of an incompressible solver. Moreover, the linear system of equations which arises from the proposed isentropic formulation is better conditioned than the homologous incompressible one due to the presence of a pressure time derivative. Similarly to other compressible formulations the prescription of boundary conditions will have to deal with the backscattering of acoustic waves. In this sense, a separated imposition of boundary conditions for flow and acoustic scales which allows the evacuation of waves through Dirichlet boundaries without using any tailored damping model will be presented.Peer Reviewed20182018-06-0120182018-04-04journal articlehttp://purl.org/coar/resource_type/c_6501AMhttp://purl.org/coar/version/c_ab4af688f83e57aainfo:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/2117/115963https://dx.doi.org/10.1016/j.jcp.2018.02.029reponame:UPCommons. Portal del coneixement obert de la UPCinstname:Universitat Politècnica de Catalunya (UPC)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2Attribution-NonCommercial-NoDerivs 3.0 Spainhttp://creativecommons.org/licenses/by-nc-nd/3.0/es/info:eu-repo/semantics/openAccessoai:upcommons.upc.edu:2117/1159632026-05-27T15:37:01Z
dc.title.none.fl_str_mv Unified solver for fluid dynamics and aeroacoustics in isentropic gas flows
title Unified solver for fluid dynamics and aeroacoustics in isentropic gas flows
spellingShingle Unified solver for fluid dynamics and aeroacoustics in isentropic gas flows
Pont Ribas, Arnau
Aeroacoustics
Isentropic flow
Computational aeroacoustics
Finite elements
Weak imposition of boundary conditions
Dinàmica de fluids -- Mètodes numèrics
Àrees temàtiques de la UPC::Física::Física de fluids
title_short Unified solver for fluid dynamics and aeroacoustics in isentropic gas flows
title_full Unified solver for fluid dynamics and aeroacoustics in isentropic gas flows
title_fullStr Unified solver for fluid dynamics and aeroacoustics in isentropic gas flows
title_full_unstemmed Unified solver for fluid dynamics and aeroacoustics in isentropic gas flows
title_sort Unified solver for fluid dynamics and aeroacoustics in isentropic gas flows
dc.creator.none.fl_str_mv Pont Ribas, Arnau
Codina, Ramon|||0000-0002-7412-778X
Baiges Aznar, Joan|||0000-0002-3940-5887
Guasch Fortuny, Oriol
author Pont Ribas, Arnau
author_facet Pont Ribas, Arnau
Codina, Ramon|||0000-0002-7412-778X
Baiges Aznar, Joan|||0000-0002-3940-5887
Guasch Fortuny, Oriol
author_role author
author2 Codina, Ramon|||0000-0002-7412-778X
Baiges Aznar, Joan|||0000-0002-3940-5887
Guasch Fortuny, Oriol
author2_role author
author
author
dc.subject.none.fl_str_mv Aeroacoustics
Isentropic flow
Computational aeroacoustics
Finite elements
Weak imposition of boundary conditions
Dinàmica de fluids -- Mètodes numèrics
Àrees temàtiques de la UPC::Física::Física de fluids
topic Aeroacoustics
Isentropic flow
Computational aeroacoustics
Finite elements
Weak imposition of boundary conditions
Dinàmica de fluids -- Mètodes numèrics
Àrees temàtiques de la UPC::Física::Física de fluids
description The high computational cost of solving numerically the fully compressible Navier–Stokes equations, together with the poor performance of most numerical formulations for compressible flow in the low Mach number regime, has led to the necessity for more affordable numerical models for Computational Aeroacoustics. For low Mach number subsonic flows with neither shocks nor thermal coupling, both flow dynamics and wave propagation can be considered isentropic. Therefore, a joint isentropic formulation for flow and aeroacoustics can be devised which avoids the need for segregating flow and acoustic scales. Under these assumptions density and pressure fluctuations are directly proportional, and a two field velocity-pressure compressible formulation can be derived as an extension of an incompressible solver. Moreover, the linear system of equations which arises from the proposed isentropic formulation is better conditioned than the homologous incompressible one due to the presence of a pressure time derivative. Similarly to other compressible formulations the prescription of boundary conditions will have to deal with the backscattering of acoustic waves. In this sense, a separated imposition of boundary conditions for flow and acoustic scales which allows the evacuation of waves through Dirichlet boundaries without using any tailored damping model will be presented.
publishDate 2018
dc.date.none.fl_str_mv 2018
2018-06-01
2018
2018-04-04
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
AM
http://purl.org/coar/version/c_ab4af688f83e57aa
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/2117/115963
https://dx.doi.org/10.1016/j.jcp.2018.02.029
url https://hdl.handle.net/2117/115963
https://dx.doi.org/10.1016/j.jcp.2018.02.029
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
Attribution-NonCommercial-NoDerivs 3.0 Spain
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
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
Attribution-NonCommercial-NoDerivs 3.0 Spain
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
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 15,300724

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