Treatment of the inlet boundary conditions in natural-convection flows in open-ended channels

Detalhes bibliográficos
Autor(a) principal: Marcondes, Francisco
Data de Publicação: 1999
Outros Autores: Maliska, Clóvis Raimundo
Tipo de documento: Artigo
Idioma: por
Título da fonte: Repositório Institucional da Universidade Federal do Ceará (UFC)
Texto Completo: http://www.repositorio.ufc.br/handle/riufc/61911
Resumo: The present work deals with the numerical solution of elliptic flows encountered in open-ended channels. The important question of applying boundary conditions for pressure and velocity for these flows is considered and a new method for the application of boundary conditions at the channel inlet is proposed. It is shown that the flow reversal at the channel outlet, which appears when nonsymmetric flow conditions are present, is strongly dependent on the entrance boundary conditions for pressure. Results for the straight channel in situations where flow reversal is present are reported for a wide range of Rayleigh numbers. Solutions for L-shaped channels are also reported with the aim of demonstrating the application of the model to arbitrary channels. It is shown that for certain flow situations the use of an elliptic formulation is imperative in order to predict correctly the flow behavior in open-ended channels.
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spelling Treatment of the inlet boundary conditions in natural-convection flows in open-ended channelsFlows in open-ended channelsEngenharia hidráulicaThe present work deals with the numerical solution of elliptic flows encountered in open-ended channels. The important question of applying boundary conditions for pressure and velocity for these flows is considered and a new method for the application of boundary conditions at the channel inlet is proposed. It is shown that the flow reversal at the channel outlet, which appears when nonsymmetric flow conditions are present, is strongly dependent on the entrance boundary conditions for pressure. Results for the straight channel in situations where flow reversal is present are reported for a wide range of Rayleigh numbers. Solutions for L-shaped channels are also reported with the aim of demonstrating the application of the model to arbitrary channels. It is shown that for certain flow situations the use of an elliptic formulation is imperative in order to predict correctly the flow behavior in open-ended channels.https://taylorandfrancis.com/ ; https://www.tandfonline.com2021-11-09T17:13:41Z2021-11-09T17:13:41Z1999info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfMARCONDES, Francisco; MALISKA, Clovis Raimundo. Treatment of the inlet boundary conditions in natural-convection flows in open-ended channels. Numerical Heat Transfer: Part B: Fundamentals, v. 35, n.3, p.317-345, 1999. Published online: 29 Oct 2010.1040-7790 (Print)1521-0626 (Online)DOI: 10.1080/104077999275893http://www.repositorio.ufc.br/handle/riufc/61911Marcondes, FranciscoMaliska, Clóvis Raimundoporreponame:Repositório Institucional da Universidade Federal do Ceará (UFC)instname:Universidade Federal do Ceará (UFC)instacron:UFCinfo:eu-repo/semantics/openAccess2022-11-10T13:34:49Zoai:repositorio.ufc.br:riufc/61911Repositório InstitucionalPUBhttp://www.repositorio.ufc.br/ri-oai/requestbu@ufc.br || repositorio@ufc.bropendoar:2024-09-11T18:58:19.484410Repositório Institucional da Universidade Federal do Ceará (UFC) - Universidade Federal do Ceará (UFC)false
dc.title.none.fl_str_mv Treatment of the inlet boundary conditions in natural-convection flows in open-ended channels
title Treatment of the inlet boundary conditions in natural-convection flows in open-ended channels
spellingShingle Treatment of the inlet boundary conditions in natural-convection flows in open-ended channels
Marcondes, Francisco
Flows in open-ended channels
Engenharia hidráulica
title_short Treatment of the inlet boundary conditions in natural-convection flows in open-ended channels
title_full Treatment of the inlet boundary conditions in natural-convection flows in open-ended channels
title_fullStr Treatment of the inlet boundary conditions in natural-convection flows in open-ended channels
title_full_unstemmed Treatment of the inlet boundary conditions in natural-convection flows in open-ended channels
title_sort Treatment of the inlet boundary conditions in natural-convection flows in open-ended channels
author Marcondes, Francisco
author_facet Marcondes, Francisco
Maliska, Clóvis Raimundo
author_role author
author2 Maliska, Clóvis Raimundo
author2_role author
dc.contributor.author.fl_str_mv Marcondes, Francisco
Maliska, Clóvis Raimundo
dc.subject.por.fl_str_mv Flows in open-ended channels
Engenharia hidráulica
topic Flows in open-ended channels
Engenharia hidráulica
description The present work deals with the numerical solution of elliptic flows encountered in open-ended channels. The important question of applying boundary conditions for pressure and velocity for these flows is considered and a new method for the application of boundary conditions at the channel inlet is proposed. It is shown that the flow reversal at the channel outlet, which appears when nonsymmetric flow conditions are present, is strongly dependent on the entrance boundary conditions for pressure. Results for the straight channel in situations where flow reversal is present are reported for a wide range of Rayleigh numbers. Solutions for L-shaped channels are also reported with the aim of demonstrating the application of the model to arbitrary channels. It is shown that for certain flow situations the use of an elliptic formulation is imperative in order to predict correctly the flow behavior in open-ended channels.
publishDate 1999
dc.date.none.fl_str_mv 1999
2021-11-09T17:13:41Z
2021-11-09T17:13:41Z
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 MARCONDES, Francisco; MALISKA, Clovis Raimundo. Treatment of the inlet boundary conditions in natural-convection flows in open-ended channels. Numerical Heat Transfer: Part B: Fundamentals, v. 35, n.3, p.317-345, 1999. Published online: 29 Oct 2010.
1040-7790 (Print)
1521-0626 (Online)
DOI: 10.1080/104077999275893
http://www.repositorio.ufc.br/handle/riufc/61911
identifier_str_mv MARCONDES, Francisco; MALISKA, Clovis Raimundo. Treatment of the inlet boundary conditions in natural-convection flows in open-ended channels. Numerical Heat Transfer: Part B: Fundamentals, v. 35, n.3, p.317-345, 1999. Published online: 29 Oct 2010.
1040-7790 (Print)
1521-0626 (Online)
DOI: 10.1080/104077999275893
url http://www.repositorio.ufc.br/handle/riufc/61911
dc.language.iso.fl_str_mv por
language por
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv https://taylorandfrancis.com/ ; https://www.tandfonline.com
publisher.none.fl_str_mv https://taylorandfrancis.com/ ; https://www.tandfonline.com
dc.source.none.fl_str_mv reponame:Repositório Institucional da Universidade Federal do Ceará (UFC)
instname:Universidade Federal do Ceará (UFC)
instacron:UFC
instname_str Universidade Federal do Ceará (UFC)
instacron_str UFC
institution UFC
reponame_str Repositório Institucional da Universidade Federal do Ceará (UFC)
collection Repositório Institucional da Universidade Federal do Ceará (UFC)
repository.name.fl_str_mv Repositório Institucional da Universidade Federal do Ceará (UFC) - Universidade Federal do Ceará (UFC)
repository.mail.fl_str_mv bu@ufc.br || repositorio@ufc.br
_version_ 1813029017691881472

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