Turbulent natural convection in enclosures using large-eddy simulation with localized heating from horizontal bottom surface and cooling from vertical surfaces

Detalhes bibliográficos
Autor(a) principal: Brito, Rogerio Fernandes
Data de Publicação: 2009
Outros Autores: Menon, Genésio José, Pirani, Marcelo José
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFBA
Texto Completo: http://www.repositorio.ufba.br/ri/handle/ri/13140
Resumo: p. 199-209
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spelling Brito, Rogerio FernandesMenon, Genésio JoséPirani, Marcelo JoséBrito, Rogerio FernandesMenon, Genésio JoséPirani, Marcelo José2013-10-08T13:04:06Z2013-10-08T13:04:06Z20091678-5878http://www.repositorio.ufba.br/ri/handle/ri/13140v. 31, n. 3p. 199-209Turbulent natural convection of air that happens into inner square cavity with localized heating from horizontal bottom surface has been numerically investigated. Localized heating is simulated by a centrally located heat source on the bottom wall, and two values of the dimensionless heat source length ∈ are considered in the present work. Solutions are obtained for several Rayleigh numbers with Prandtl number Pr = 0.70. The horizontal top surface is thermally insulated and the vertical surfaces are assumed to be the cold isothermal surfaces whereas the heat source on the bottom wall is isothermally heated. In this study, the Navier-Stokes equations are used considering a two-dimensional and turbulent flow in unsteady state. The Finite Element Method (FEM) with a Galerkin scheme is utilized for solving the conservation equations. The formulation of conservation equations is carried out for turbulent flow and the implementation of turbulent model is made by Large-Eddy Simulation (LES). The distributions of the stream function and of the temperature are determined as functions of thermal and geometrical parameters. The average Nusselt number Num is shown to increase with an increase in the Rayleigh number Ra as well as in the dimensionless heat source length ∈. The results of this work can be applied to the design of electronic components.Submitted by Suelen Reis (suziy.ellen@gmail.com) on 2013-10-07T14:31:24Z No. of bitstreams: 1 a05v31n3.pdf: 815985 bytes, checksum: fab9cb8e29f89dcaffae99694b897623 (MD5)Approved for entry into archive by LIVIA FREITAS(livia.freitas@ufba.br) on 2013-10-08T13:04:06Z (GMT) No. of bitstreams: 1 a05v31n3.pdf: 815985 bytes, checksum: fab9cb8e29f89dcaffae99694b897623 (MD5)Made available in DSpace on 2013-10-08T13:04:06Z (GMT). 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dc.title.pt_BR.fl_str_mv Turbulent natural convection in enclosures using large-eddy simulation with localized heating from horizontal bottom surface and cooling from vertical surfaces
dc.title.alternative.pt_BR.fl_str_mv Journal of the Brazilian Society of Mechanical Sciences and Engineering
title Turbulent natural convection in enclosures using large-eddy simulation with localized heating from horizontal bottom surface and cooling from vertical surfaces
spellingShingle Turbulent natural convection in enclosures using large-eddy simulation with localized heating from horizontal bottom surface and cooling from vertical surfaces
Brito, Rogerio Fernandes
Cavities
Finite element
Turbulence
Natural convection
LES
title_short Turbulent natural convection in enclosures using large-eddy simulation with localized heating from horizontal bottom surface and cooling from vertical surfaces
title_full Turbulent natural convection in enclosures using large-eddy simulation with localized heating from horizontal bottom surface and cooling from vertical surfaces
title_fullStr Turbulent natural convection in enclosures using large-eddy simulation with localized heating from horizontal bottom surface and cooling from vertical surfaces
title_full_unstemmed Turbulent natural convection in enclosures using large-eddy simulation with localized heating from horizontal bottom surface and cooling from vertical surfaces
title_sort Turbulent natural convection in enclosures using large-eddy simulation with localized heating from horizontal bottom surface and cooling from vertical surfaces
author Brito, Rogerio Fernandes
author_facet Brito, Rogerio Fernandes
Menon, Genésio José
Pirani, Marcelo José
author_role author
author2 Menon, Genésio José
Pirani, Marcelo José
author2_role author
author
dc.contributor.author.fl_str_mv Brito, Rogerio Fernandes
Menon, Genésio José
Pirani, Marcelo José
Brito, Rogerio Fernandes
Menon, Genésio José
Pirani, Marcelo José
dc.subject.por.fl_str_mv Cavities
Finite element
Turbulence
Natural convection
LES
topic Cavities
Finite element
Turbulence
Natural convection
LES
description p. 199-209
publishDate 2009
dc.date.issued.fl_str_mv 2009
dc.date.accessioned.fl_str_mv 2013-10-08T13:04:06Z
dc.date.available.fl_str_mv 2013-10-08T13:04:06Z
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://www.repositorio.ufba.br/ri/handle/ri/13140
dc.identifier.issn.none.fl_str_mv 1678-5878
dc.identifier.number.pt_BR.fl_str_mv v. 31, n. 3
identifier_str_mv 1678-5878
v. 31, n. 3
url http://www.repositorio.ufba.br/ri/handle/ri/13140
dc.language.iso.fl_str_mv eng
language eng
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.source.pt_BR.fl_str_mv http://dx.doi.org/10.1590/S1678-58782009000300005
dc.source.none.fl_str_mv reponame:Repositório Institucional da UFBA
instname:Universidade Federal da Bahia (UFBA)
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reponame_str Repositório Institucional da UFBA
collection Repositório Institucional da UFBA
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