Heat Transfer in a Short Parallel-Plate Channel in the Transition Regime

Autores
Silin, Nicolas; Masson, Viviana Patricia; Marino, Raúl Guillermo Jesús
Año de publicación
2012
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Heat transfer in a parallel-plate channel with uniform wall heat flux and refrigerated by water is investigated experimentally for the laminar and transition hydrodynamic regimes. The dimensions of the channel were chosen such that entry effects are relevant for a significant part of the channel length. The influence of the following parameters has been studied: inlet Reynolds number, inlet temperature and wall heat flux. Experimental results are compared with predictions based on different empirical correlations for convection in ducts. This analysis shows that the correlation of Gnielinski provides a good agreement with the experimental results for Reynolds numbers between 5,000 and 10,000 at 20°C and under relatively low heat fluxes. Experiments performed at relatively low heat fluxes show that, in the entry region previous to the laminar-turbulent transition, the behavior of the flow is well described by the combined hydrodynamic and thermal entry solution obtained by Hwang and Fan (Finite Difference Analysis of Forced-Convection Heat Transfer in Inlet Region of a Flat Rectangular Duct, Appl. Sci. Res., vol. 13, pp. 401?422, 1964). The hydrodynamic and thermal entry effects for the experimental conditions in the present work are relevant for most of the test section. The location of the transition point is affected in the first instance by the local bulk Reynolds. On the other hand, the wall heat flux affects the fluid properties, i.e., the fluid viscosity, and therefore, it also affects the transition. It was found that for the transition regime, an increase of the wall heat flux produces lower values of the convection coefficient than the values predicted by the correlation of Gnielinski. This behavior, which seems to be associated to the variation of the fluid properties, is opposite to the increase of the convection coefficient observed for heating in the laminar and turbulent regimes for water and oils. The case of an inlet Reynolds number of 5,000 was studied in detail, and the influence of heat flux on the Nusselt number is addressed.
Fil: Silin, Nicolas. Comisión Nacional de Energía Atómica. Gerencia del Área de Energía Nuclear. Instituto Balseiro; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina
Fil: Masson, Viviana Patricia. Comisión Nacional de Energía Atómica. Gerencia del Área de Energía Nuclear. Instituto Balseiro; Argentina. Comision Nacional de Energia Atomica. Gerencia D/area de Energia Nuclear. Gerencia de Ingeniería Nuclear (cab). Grupo Termohidraulica; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina
Fil: Marino, Raúl Guillermo Jesús. Universidad Austral; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Materia
paralel-plate channel
hydrodynamic transition
heat transfer
high heat flux
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/268801
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/268801
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Heat Transfer in a Short Parallel-Plate Channel in the Transition RegimeSilin, NicolasMasson, Viviana PatriciaMarino, Raúl Guillermo Jesúsparalel-plate channelhydrodynamic transitionheat transferhigh heat fluxhttps://purl.org/becyt/ford/2.11https://purl.org/becyt/ford/2Heat transfer in a parallel-plate channel with uniform wall heat flux and refrigerated by water is investigated experimentally for the laminar and transition hydrodynamic regimes. The dimensions of the channel were chosen such that entry effects are relevant for a significant part of the channel length. The influence of the following parameters has been studied: inlet Reynolds number, inlet temperature and wall heat flux. Experimental results are compared with predictions based on different empirical correlations for convection in ducts. This analysis shows that the correlation of Gnielinski provides a good agreement with the experimental results for Reynolds numbers between 5,000 and 10,000 at 20°C and under relatively low heat fluxes. Experiments performed at relatively low heat fluxes show that, in the entry region previous to the laminar-turbulent transition, the behavior of the flow is well described by the combined hydrodynamic and thermal entry solution obtained by Hwang and Fan (Finite Difference Analysis of Forced-Convection Heat Transfer in Inlet Region of a Flat Rectangular Duct, Appl. Sci. Res., vol. 13, pp. 401?422, 1964). The hydrodynamic and thermal entry effects for the experimental conditions in the present work are relevant for most of the test section. The location of the transition point is affected in the first instance by the local bulk Reynolds. On the other hand, the wall heat flux affects the fluid properties, i.e., the fluid viscosity, and therefore, it also affects the transition. It was found that for the transition regime, an increase of the wall heat flux produces lower values of the convection coefficient than the values predicted by the correlation of Gnielinski. This behavior, which seems to be associated to the variation of the fluid properties, is opposite to the increase of the convection coefficient observed for heating in the laminar and turbulent regimes for water and oils. The case of an inlet Reynolds number of 5,000 was studied in detail, and the influence of heat flux on the Nusselt number is addressed.Fil: Silin, Nicolas. Comisión Nacional de Energía Atómica. Gerencia del Área de Energía Nuclear. Instituto Balseiro; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; ArgentinaFil: Masson, Viviana Patricia. Comisión Nacional de Energía Atómica. Gerencia del Área de Energía Nuclear. Instituto Balseiro; Argentina. Comision Nacional de Energia Atomica. Gerencia D/area de Energia Nuclear. Gerencia de Ingeniería Nuclear (cab). Grupo Termohidraulica; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; ArgentinaFil: Marino, Raúl Guillermo Jesús. Universidad Austral; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaTaylor & Francis2012-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/268801Silin, Nicolas; Masson, Viviana Patricia; Marino, Raúl Guillermo Jesús; Heat Transfer in a Short Parallel-Plate Channel in the Transition Regime; Taylor & Francis; Experimental Heat Transfer; 25; 1; 1-2012; 12-290891-6152CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/http://www.tandfonline.com/doi/abs/10.1080/08916152.2011.556312info:eu-repo/semantics/altIdentifier/doi/10.1080/08916152.2011.556312info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T09:44:35Zoai:ri.conicet.gov.ar:11336/268801instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-03 09:44:35.59CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Heat Transfer in a Short Parallel-Plate Channel in the Transition Regime
title Heat Transfer in a Short Parallel-Plate Channel in the Transition Regime
spellingShingle Heat Transfer in a Short Parallel-Plate Channel in the Transition Regime
Silin, Nicolas
paralel-plate channel
hydrodynamic transition
heat transfer
high heat flux
title_short Heat Transfer in a Short Parallel-Plate Channel in the Transition Regime
title_full Heat Transfer in a Short Parallel-Plate Channel in the Transition Regime
title_fullStr Heat Transfer in a Short Parallel-Plate Channel in the Transition Regime
title_full_unstemmed Heat Transfer in a Short Parallel-Plate Channel in the Transition Regime
title_sort Heat Transfer in a Short Parallel-Plate Channel in the Transition Regime
dc.creator.none.fl_str_mv Silin, Nicolas
Masson, Viviana Patricia
Marino, Raúl Guillermo Jesús
author Silin, Nicolas
author_facet Silin, Nicolas
Masson, Viviana Patricia
Marino, Raúl Guillermo Jesús
author_role author
author2 Masson, Viviana Patricia
Marino, Raúl Guillermo Jesús
author2_role author
author
dc.subject.none.fl_str_mv paralel-plate channel
hydrodynamic transition
heat transfer
high heat flux
topic paralel-plate channel
hydrodynamic transition
heat transfer
high heat flux
purl_subject.fl_str_mv https://purl.org/becyt/ford/2.11
https://purl.org/becyt/ford/2
dc.description.none.fl_txt_mv Heat transfer in a parallel-plate channel with uniform wall heat flux and refrigerated by water is investigated experimentally for the laminar and transition hydrodynamic regimes. The dimensions of the channel were chosen such that entry effects are relevant for a significant part of the channel length. The influence of the following parameters has been studied: inlet Reynolds number, inlet temperature and wall heat flux. Experimental results are compared with predictions based on different empirical correlations for convection in ducts. This analysis shows that the correlation of Gnielinski provides a good agreement with the experimental results for Reynolds numbers between 5,000 and 10,000 at 20°C and under relatively low heat fluxes. Experiments performed at relatively low heat fluxes show that, in the entry region previous to the laminar-turbulent transition, the behavior of the flow is well described by the combined hydrodynamic and thermal entry solution obtained by Hwang and Fan (Finite Difference Analysis of Forced-Convection Heat Transfer in Inlet Region of a Flat Rectangular Duct, Appl. Sci. Res., vol. 13, pp. 401?422, 1964). The hydrodynamic and thermal entry effects for the experimental conditions in the present work are relevant for most of the test section. The location of the transition point is affected in the first instance by the local bulk Reynolds. On the other hand, the wall heat flux affects the fluid properties, i.e., the fluid viscosity, and therefore, it also affects the transition. It was found that for the transition regime, an increase of the wall heat flux produces lower values of the convection coefficient than the values predicted by the correlation of Gnielinski. This behavior, which seems to be associated to the variation of the fluid properties, is opposite to the increase of the convection coefficient observed for heating in the laminar and turbulent regimes for water and oils. The case of an inlet Reynolds number of 5,000 was studied in detail, and the influence of heat flux on the Nusselt number is addressed.
Fil: Silin, Nicolas. Comisión Nacional de Energía Atómica. Gerencia del Área de Energía Nuclear. Instituto Balseiro; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina
Fil: Masson, Viviana Patricia. Comisión Nacional de Energía Atómica. Gerencia del Área de Energía Nuclear. Instituto Balseiro; Argentina. Comision Nacional de Energia Atomica. Gerencia D/area de Energia Nuclear. Gerencia de Ingeniería Nuclear (cab). Grupo Termohidraulica; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte; Argentina
Fil: Marino, Raúl Guillermo Jesús. Universidad Austral; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
description Heat transfer in a parallel-plate channel with uniform wall heat flux and refrigerated by water is investigated experimentally for the laminar and transition hydrodynamic regimes. The dimensions of the channel were chosen such that entry effects are relevant for a significant part of the channel length. The influence of the following parameters has been studied: inlet Reynolds number, inlet temperature and wall heat flux. Experimental results are compared with predictions based on different empirical correlations for convection in ducts. This analysis shows that the correlation of Gnielinski provides a good agreement with the experimental results for Reynolds numbers between 5,000 and 10,000 at 20°C and under relatively low heat fluxes. Experiments performed at relatively low heat fluxes show that, in the entry region previous to the laminar-turbulent transition, the behavior of the flow is well described by the combined hydrodynamic and thermal entry solution obtained by Hwang and Fan (Finite Difference Analysis of Forced-Convection Heat Transfer in Inlet Region of a Flat Rectangular Duct, Appl. Sci. Res., vol. 13, pp. 401?422, 1964). The hydrodynamic and thermal entry effects for the experimental conditions in the present work are relevant for most of the test section. The location of the transition point is affected in the first instance by the local bulk Reynolds. On the other hand, the wall heat flux affects the fluid properties, i.e., the fluid viscosity, and therefore, it also affects the transition. It was found that for the transition regime, an increase of the wall heat flux produces lower values of the convection coefficient than the values predicted by the correlation of Gnielinski. This behavior, which seems to be associated to the variation of the fluid properties, is opposite to the increase of the convection coefficient observed for heating in the laminar and turbulent regimes for water and oils. The case of an inlet Reynolds number of 5,000 was studied in detail, and the influence of heat flux on the Nusselt number is addressed.
publishDate 2012
dc.date.none.fl_str_mv 2012-01
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/268801
Silin, Nicolas; Masson, Viviana Patricia; Marino, Raúl Guillermo Jesús; Heat Transfer in a Short Parallel-Plate Channel in the Transition Regime; Taylor & Francis; Experimental Heat Transfer; 25; 1; 1-2012; 12-29
0891-6152
CONICET Digital
CONICET
url http://hdl.handle.net/11336/268801
identifier_str_mv Silin, Nicolas; Masson, Viviana Patricia; Marino, Raúl Guillermo Jesús; Heat Transfer in a Short Parallel-Plate Channel in the Transition Regime; Taylor & Francis; Experimental Heat Transfer; 25; 1; 1-2012; 12-29
0891-6152
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/http://www.tandfonline.com/doi/abs/10.1080/08916152.2011.556312
info:eu-repo/semantics/altIdentifier/doi/10.1080/08916152.2011.556312
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Taylor & Francis
publisher.none.fl_str_mv Taylor & Francis
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 13.13397

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