Investigation of a novel numerical scheme for high-pressure supercritical fluids turbulence

High-pressure supercritical turbulence simulations are strongly susceptible to numerical instabilities. The multi-scale nature of the flow, in conjunction with the nonlinear thermodynamics and the strong density gradients across the pseudo-boiling line can trigger spurious pressure oscillations and...

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Detalles Bibliográficos
Autores: Bernades, Marc|||0000-0003-3761-2038, Jofre Cruanyes, Lluís|||0000-0003-2437-259X, Capuano, Francesco|||0000-0003-0274-5260
Tipo de recurso: informe técnico
Fecha de publicación:2022
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:2117/385161
Acceso en línea:https://hdl.handle.net/2117/385161
Access Level:acceso abierto
Palabra clave:Turbulence -- Mathematical models
Supercritical fluids
Turbulència -- Models matemàtics
Fluids supercrítics
Àrees temàtiques de la UPC::Enginyeria mecànica::Mecànica de fluids
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spelling Investigation of a novel numerical scheme for high-pressure supercritical fluids turbulenceBernades, Marc|||0000-0003-3761-2038Jofre Cruanyes, Lluís|||0000-0003-2437-259XCapuano, Francesco|||0000-0003-0274-5260Turbulence -- Mathematical modelsSupercritical fluidsTurbulència -- Models matemàticsFluids supercríticsÀrees temàtiques de la UPC::Enginyeria mecànica::Mecànica de fluidsHigh-pressure supercritical turbulence simulations are strongly susceptible to numerical instabilities. The multi-scale nature of the flow, in conjunction with the nonlinear thermodynamics and the strong density gradients across the pseudo-boiling line can trigger spurious pressure oscillations and unbounded amplification of aliasing errors. A wide variety of regularization approaches have been traditionally utilized by the community, including upwind-biased schemes, artificial dissipation, and/or high-order filtering, where stability is achieved at the expense of suppressing part of the turbulent energy spectrum. In this work, a novel numerical scheme based on the paradigm of physics-compatible discretizations is investigated. In particular, the proposed method discretely enforces kinetic-energy conservation (by convection) as well as preservation of pressure equilibrium; the former is achieved using proper splitting of the convective terms, whereas the latter is obtained by directly evolving an equation for pressure. The simultaneous enforcement of these two properties can lead to stable and physically consistent scale-resolving simulations of supercritical turbulence without the need for any form of artificial stabilization. The novel method is preliminarly assessed on two benchmark cases, with numerical results supporting the theoretical findings.20222022-01-0120232023-03-17reporthttp://purl.org/coar/resource_type/c_93fcAOhttp://purl.org/coar/version/c_b1a7d7d4d402bcceinfo:eu-repo/semantics/reportapplication/pdfhttps://hdl.handle.net/2117/385161reponame: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:2117/3851612026-05-27T15:37:01Z
dc.title.none.fl_str_mv Investigation of a novel numerical scheme for high-pressure supercritical fluids turbulence
title Investigation of a novel numerical scheme for high-pressure supercritical fluids turbulence
spellingShingle Investigation of a novel numerical scheme for high-pressure supercritical fluids turbulence
Bernades, Marc|||0000-0003-3761-2038
Turbulence -- Mathematical models
Supercritical fluids
Turbulència -- Models matemàtics
Fluids supercrítics
Àrees temàtiques de la UPC::Enginyeria mecànica::Mecànica de fluids
title_short Investigation of a novel numerical scheme for high-pressure supercritical fluids turbulence
title_full Investigation of a novel numerical scheme for high-pressure supercritical fluids turbulence
title_fullStr Investigation of a novel numerical scheme for high-pressure supercritical fluids turbulence
title_full_unstemmed Investigation of a novel numerical scheme for high-pressure supercritical fluids turbulence
title_sort Investigation of a novel numerical scheme for high-pressure supercritical fluids turbulence
dc.creator.none.fl_str_mv Bernades, Marc|||0000-0003-3761-2038
Jofre Cruanyes, Lluís|||0000-0003-2437-259X
Capuano, Francesco|||0000-0003-0274-5260
author Bernades, Marc|||0000-0003-3761-2038
author_facet Bernades, Marc|||0000-0003-3761-2038
Jofre Cruanyes, Lluís|||0000-0003-2437-259X
Capuano, Francesco|||0000-0003-0274-5260
author_role author
author2 Jofre Cruanyes, Lluís|||0000-0003-2437-259X
Capuano, Francesco|||0000-0003-0274-5260
author2_role author
author
dc.subject.none.fl_str_mv Turbulence -- Mathematical models
Supercritical fluids
Turbulència -- Models matemàtics
Fluids supercrítics
Àrees temàtiques de la UPC::Enginyeria mecànica::Mecànica de fluids
topic Turbulence -- Mathematical models
Supercritical fluids
Turbulència -- Models matemàtics
Fluids supercrítics
Àrees temàtiques de la UPC::Enginyeria mecànica::Mecànica de fluids
description High-pressure supercritical turbulence simulations are strongly susceptible to numerical instabilities. The multi-scale nature of the flow, in conjunction with the nonlinear thermodynamics and the strong density gradients across the pseudo-boiling line can trigger spurious pressure oscillations and unbounded amplification of aliasing errors. A wide variety of regularization approaches have been traditionally utilized by the community, including upwind-biased schemes, artificial dissipation, and/or high-order filtering, where stability is achieved at the expense of suppressing part of the turbulent energy spectrum. In this work, a novel numerical scheme based on the paradigm of physics-compatible discretizations is investigated. In particular, the proposed method discretely enforces kinetic-energy conservation (by convection) as well as preservation of pressure equilibrium; the former is achieved using proper splitting of the convective terms, whereas the latter is obtained by directly evolving an equation for pressure. The simultaneous enforcement of these two properties can lead to stable and physically consistent scale-resolving simulations of supercritical turbulence without the need for any form of artificial stabilization. The novel method is preliminarly assessed on two benchmark cases, with numerical results supporting the theoretical findings.
publishDate 2022
dc.date.none.fl_str_mv 2022
2022-01-01
2023
2023-03-17
dc.type.none.fl_str_mv report
http://purl.org/coar/resource_type/c_93fc
AO
http://purl.org/coar/version/c_b1a7d7d4d402bcce
dc.type.openaire.fl_str_mv info:eu-repo/semantics/report
format report
dc.identifier.none.fl_str_mv https://hdl.handle.net/2117/385161
url https://hdl.handle.net/2117/385161
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.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 15,300719

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