The effect of roughness on separating flow over two-dimensional hills

Detalhes bibliográficos
Autor(a) principal: Loureiro, Juliana Braga Rodrigues
Data de Publicação: 2008
Outros Autores: Monteiro, André Sampaio, Pinho, Fernando Manuel Coutinho Tavares de, Freire, Atila Pantaleão Silva
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFRJ
Texto Completo: http://hdl.handle.net/11422/8785
Resumo: Indisponível.
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spelling Loureiro, Juliana Braga RodriguesMonteiro, André SampaioPinho, Fernando Manuel Coutinho Tavares deFreire, Atila Pantaleão Silva2019-07-12T17:15:02Z2023-11-30T03:03:36Z2008-12-110723-4864http://hdl.handle.net/11422/878510.1007/s00348-008-0583-4Indisponível.Two new experimental data sets for turbulent flow over a steep, rough hill are presented. These include detailed laser Doppler anemometry measurements obtained at the separation and reattachment points and, in particular, within the reverse flow region on the lee side of the hill. These results allow the development of a new parametrization for rough wall boundary layers and validate the use of Stratford’s solution for a separating rough flow. The experiments were conducted in a water channel for two different Reynolds numbers. In the first set of rough wall experiments, the flow conditions and the hill shape are similar to those presented in Loureiro et al. (Exp. Fluids, 42:441–457, 2007a) for a smooth surface, leading to a much reduced separation region. In the second set of experiments, the Reynolds number is raised ten times. The region of separated flow is then observed to increase, but still to a length shorter than that recorded by Loureiro et al. (Exp. Fluids, 42:441–457, 2007a). Detailed data on mean velocity and turbulent quantities are presented. To quantify the wall shear stress, global optimization algorithms are used. The merit function is defined in terms of a local solution that is shown to reduce to the classical law of the wall far away from a separation point and to the expression of Stratford at a separation point. The flow structure at the separation point is also discussed.Submitted by Jairo Amaro (jairo.amaro@sibi.ufrj.br) on 2019-07-12T17:15:02Z No. of bitstreams: 1 2009_FREIRE_ExpFluids46-min.pdf: 1644312 bytes, checksum: 80e8a04a5eff2d97fa045d4577450c85 (MD5)Made available in DSpace on 2019-07-12T17:15:02Z (GMT). No. of bitstreams: 1 2009_FREIRE_ExpFluids46-min.pdf: 1644312 bytes, checksum: 80e8a04a5eff2d97fa045d4577450c85 (MD5) Previous issue date: 2008-12-11engSpringerBrasilNúcleo Interdisciplinar de Dinâmica dos FluidosExperiments in FluidsCNPQ::CIENCIAS EXATAS E DA TERRA::FISICA::AREAS CLASSICAS DE FENOMENOLOGIA E SUAS APLICACOES::DINAMICA DOS FLUIDOSWall Shear StressReverse FlowSeparation PointSeparation BubbleRoughness ElementThe effect of roughness on separating flow over two-dimensional hillsinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article46577596365 diasinfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFRJinstname:Universidade Federal do Rio de Janeiro (UFRJ)instacron:UFRJORIGINAL2009_FREIRE_ExpFluids46-min.pdf2009_FREIRE_ExpFluids46-min.pdfapplication/pdf1644312http://pantheon.ufrj.br:80/bitstream/11422/8785/1/2009_FREIRE_ExpFluids46-min.pdf80e8a04a5eff2d97fa045d4577450c85MD51LICENSElicense.txtlicense.txttext/plain; charset=utf-81853http://pantheon.ufrj.br:80/bitstream/11422/8785/2/license.txtdd32849f2bfb22da963c3aac6e26e255MD5211422/87852023-11-30 00:03:36.307oai:pantheon.ufrj.br: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Repositório de PublicaçõesPUBhttp://www.pantheon.ufrj.br/oai/requestopendoar:2023-11-30T03:03:36Repositório Institucional da UFRJ - Universidade Federal do Rio de Janeiro (UFRJ)false
dc.title.en.fl_str_mv The effect of roughness on separating flow over two-dimensional hills
title The effect of roughness on separating flow over two-dimensional hills
spellingShingle The effect of roughness on separating flow over two-dimensional hills
Loureiro, Juliana Braga Rodrigues
CNPQ::CIENCIAS EXATAS E DA TERRA::FISICA::AREAS CLASSICAS DE FENOMENOLOGIA E SUAS APLICACOES::DINAMICA DOS FLUIDOS
Wall Shear Stress
Reverse Flow
Separation Point
Separation Bubble
Roughness Element
title_short The effect of roughness on separating flow over two-dimensional hills
title_full The effect of roughness on separating flow over two-dimensional hills
title_fullStr The effect of roughness on separating flow over two-dimensional hills
title_full_unstemmed The effect of roughness on separating flow over two-dimensional hills
title_sort The effect of roughness on separating flow over two-dimensional hills
author Loureiro, Juliana Braga Rodrigues
author_facet Loureiro, Juliana Braga Rodrigues
Monteiro, André Sampaio
Pinho, Fernando Manuel Coutinho Tavares de
Freire, Atila Pantaleão Silva
author_role author
author2 Monteiro, André Sampaio
Pinho, Fernando Manuel Coutinho Tavares de
Freire, Atila Pantaleão Silva
author2_role author
author
author
dc.contributor.author.fl_str_mv Loureiro, Juliana Braga Rodrigues
Monteiro, André Sampaio
Pinho, Fernando Manuel Coutinho Tavares de
Freire, Atila Pantaleão Silva
dc.subject.cnpq.fl_str_mv CNPQ::CIENCIAS EXATAS E DA TERRA::FISICA::AREAS CLASSICAS DE FENOMENOLOGIA E SUAS APLICACOES::DINAMICA DOS FLUIDOS
topic CNPQ::CIENCIAS EXATAS E DA TERRA::FISICA::AREAS CLASSICAS DE FENOMENOLOGIA E SUAS APLICACOES::DINAMICA DOS FLUIDOS
Wall Shear Stress
Reverse Flow
Separation Point
Separation Bubble
Roughness Element
dc.subject.eng.fl_str_mv Wall Shear Stress
Reverse Flow
Separation Point
Separation Bubble
Roughness Element
description Indisponível.
publishDate 2008
dc.date.issued.fl_str_mv 2008-12-11
dc.date.accessioned.fl_str_mv 2019-07-12T17:15:02Z
dc.date.available.fl_str_mv 2023-11-30T03:03:36Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/11422/8785
dc.identifier.issn.pt_BR.fl_str_mv 0723-4864
dc.identifier.doi.pt_BR.fl_str_mv 10.1007/s00348-008-0583-4
identifier_str_mv 0723-4864
10.1007/s00348-008-0583-4
url http://hdl.handle.net/11422/8785
dc.language.iso.fl_str_mv eng
language eng
dc.relation.ispartof.en.fl_str_mv Experiments in Fluids
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Springer
dc.publisher.country.fl_str_mv Brasil
dc.publisher.department.fl_str_mv Núcleo Interdisciplinar de Dinâmica dos Fluidos
publisher.none.fl_str_mv Springer
dc.source.none.fl_str_mv reponame:Repositório Institucional da UFRJ
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reponame_str Repositório Institucional da UFRJ
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