Turbulent Couette flow up to Re pi = 2000

[EN] Two simulations of turbulent Couette flows were performed at friction Reynolds numbers of 1000 and 2000 in a large box of dimensions L-x = 16 pi h, L-y = 2h and L-z = 6 pi h, where h is the semi-height of the channel. The study focuses on the differences in the intensity and scaling of turbulen...

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Autores: Hoyas, Sergio|||0000-0002-8458-7288, Oberlack, Martin
Tipo de recurso: artículo
Fecha de publicación:2024
País:España
Institución:Universitat Politècnica de València (UPV)
Repositorio:RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia
Idioma:inglés
OAI Identifier:oai:riunet.upv.es:10251/207496
Acceso en línea:https://riunet.upv.es/handle/10251/207496
Access Level:acceso abierto
Palabra clave:Turbulence theory
Turbulent boundary layers
INGENIERIA AEROESPACIAL
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spelling Turbulent Couette flow up to Re pi = 2000Hoyas, Sergio|||0000-0002-8458-7288Oberlack, MartinTurbulence theoryTurbulent boundary layersINGENIERIA AEROESPACIAL[EN] Two simulations of turbulent Couette flows were performed at friction Reynolds numbers of 1000 and 2000 in a large box of dimensions L-x = 16 pi h, L-y = 2h and L-z = 6 pi h, where h is the semi-height of the channel. The study focuses on the differences in the intensity and scaling of turbulence at these two Reynolds numbers. The 2000 case showed a lack of a clear log layer with a higher value of the Von Karman constant kappa than Poiseuille channels. The intensities were well-scaled in the buffer layer and below, with a second maximum of the streamwise intensity at approximately 350 wall units. Contrary to Poiseuille channels, the dissipation scales close to the wall in wall units. This fact can be attributed to the constant value of the derivative of the streamwise intensity in wall units. The intensities of the 2000 case showed remarkable differences compared with those at Reynolds number 1000 at the channel centre, likely due to the organization of large scales of the streamwise fluctuactions, u. These large scales were thought to be considered 'infinite'. However, for the 2000 case, while all the structures have a width of L-z approximate to 6/8 pi h, their length varies from L-x approximate to 6 pi h to L-x approximate to 16 pi h, which clearly contradicts the trends obtained in the past. This is a new effect that has not been reported for turbulent Couette flow and points to the uncertainty and sensitivity that is observed for certain statistical quantities.The authors gratefully acknowledge the provision of computing time on the Gauss Centre for Supercomputing e.V. on the GCS Supercomputer SuperMUC-NG at Leibniz Supercomputing Centre under project number pr92la. M.O. acknowledges partial funding by the German Research Foundation (DFG) under the project OB 96/48-1. S.H. is partially funded by project PID2021-128676OB-I00 by Ministerio de Ciencia, innovacion y Universidades/FEDER.Cambridge University PressDepartamento de Máquinas y Motores TérmicosEscuela Técnica Superior de Ingeniería Aeroespacial y Diseño IndustrialInstituto Universitario de Matemática Pura y AplicadaLeibniz Supercomputing CentreDeutsche ForschungsgemeinschaftAgencia Estatal de InvestigaciónRepositorio Institucional de la Universitat Politècnica de València Riunet20242024-05-22journal articlehttp://purl.org/coar/resource_type/c_6501VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleapplication/pdfhttps://riunet.upv.es/handle/10251/207496reponame:RiuNet. Repositorio Institucional de la Universitat Politécnica de Valénciainstname:Universitat Politècnica de València (UPV)InglésengAgencia Estatal de Investigación http://dx.doi.org/10.13039/501100011033 Plan Estatal de Investigación Científica y Técnica y de Innovación 2021-2023 PID2021-128676OB-I00 REVELANDO LA TURBULENCIA DE PAREDDeutsche Forschungsgemeinschaft https://doi.org/10.13039/501100001659 OB96%2F48-1Leibniz Supercomputing Centre LRZ pr92laopen accesshttp://purl.org/coar/access_right/c_abf2Reconocimiento (by)http://creativecommons.org/licenses/by/4.0/info:eu-repo/semantics/openAccessoai:riunet.upv.es:10251/2074962026-06-13T07:49:27Z
dc.title.none.fl_str_mv Turbulent Couette flow up to Re pi = 2000
title Turbulent Couette flow up to Re pi = 2000
spellingShingle Turbulent Couette flow up to Re pi = 2000
Hoyas, Sergio|||0000-0002-8458-7288
Turbulence theory
Turbulent boundary layers
INGENIERIA AEROESPACIAL
title_short Turbulent Couette flow up to Re pi = 2000
title_full Turbulent Couette flow up to Re pi = 2000
title_fullStr Turbulent Couette flow up to Re pi = 2000
title_full_unstemmed Turbulent Couette flow up to Re pi = 2000
title_sort Turbulent Couette flow up to Re pi = 2000
dc.creator.none.fl_str_mv Hoyas, Sergio|||0000-0002-8458-7288
Oberlack, Martin
author Hoyas, Sergio|||0000-0002-8458-7288
author_facet Hoyas, Sergio|||0000-0002-8458-7288
Oberlack, Martin
author_role author
author2 Oberlack, Martin
author2_role author
dc.contributor.none.fl_str_mv Departamento de Máquinas y Motores Térmicos
Escuela Técnica Superior de Ingeniería Aeroespacial y Diseño Industrial
Instituto Universitario de Matemática Pura y Aplicada
Leibniz Supercomputing Centre
Deutsche Forschungsgemeinschaft
Agencia Estatal de Investigación
Repositorio Institucional de la Universitat Politècnica de València Riunet
dc.subject.none.fl_str_mv Turbulence theory
Turbulent boundary layers
INGENIERIA AEROESPACIAL
topic Turbulence theory
Turbulent boundary layers
INGENIERIA AEROESPACIAL
description [EN] Two simulations of turbulent Couette flows were performed at friction Reynolds numbers of 1000 and 2000 in a large box of dimensions L-x = 16 pi h, L-y = 2h and L-z = 6 pi h, where h is the semi-height of the channel. The study focuses on the differences in the intensity and scaling of turbulence at these two Reynolds numbers. The 2000 case showed a lack of a clear log layer with a higher value of the Von Karman constant kappa than Poiseuille channels. The intensities were well-scaled in the buffer layer and below, with a second maximum of the streamwise intensity at approximately 350 wall units. Contrary to Poiseuille channels, the dissipation scales close to the wall in wall units. This fact can be attributed to the constant value of the derivative of the streamwise intensity in wall units. The intensities of the 2000 case showed remarkable differences compared with those at Reynolds number 1000 at the channel centre, likely due to the organization of large scales of the streamwise fluctuactions, u. These large scales were thought to be considered 'infinite'. However, for the 2000 case, while all the structures have a width of L-z approximate to 6/8 pi h, their length varies from L-x approximate to 6 pi h to L-x approximate to 16 pi h, which clearly contradicts the trends obtained in the past. This is a new effect that has not been reported for turbulent Couette flow and points to the uncertainty and sensitivity that is observed for certain statistical quantities.
publishDate 2024
dc.date.none.fl_str_mv 2024
2024-05-22
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
VoR
http://purl.org/coar/version/c_970fb48d4fbd8a85
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://riunet.upv.es/handle/10251/207496
url https://riunet.upv.es/handle/10251/207496
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.relation.none.fl_str_mv Agencia Estatal de Investigación http://dx.doi.org/10.13039/501100011033 Plan Estatal de Investigación Científica y Técnica y de Innovación 2021-2023 PID2021-128676OB-I00 REVELANDO LA TURBULENCIA DE PARED
Deutsche Forschungsgemeinschaft https://doi.org/10.13039/501100001659 OB96%2F48-1
Leibniz Supercomputing Centre LRZ pr92la
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
Reconocimiento (by)
http://creativecommons.org/licenses/by/4.0/
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
Reconocimiento (by)
http://creativecommons.org/licenses/by/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Cambridge University Press
publisher.none.fl_str_mv Cambridge University Press
dc.source.none.fl_str_mv reponame:RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia
instname:Universitat Politècnica de València (UPV)
instname_str Universitat Politècnica de València (UPV)
reponame_str RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia
collection RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia
repository.name.fl_str_mv
repository.mail.fl_str_mv
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