Numerical correlation for natural convective flows in isothermal heated, inclined and convergent channels for high Rayleigh numbers

A numerical study of natural convective flows, mainly for high Rayleigh numbers, in a sloped converging channel, for different inclination and convergence angles has been carried out, taking into account the lacks of the literature on some aspect of this configuration. Two dimensional, laminar, tran...

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Authors: Sánchez Kaiser, Antonio, Zamora Parra, Blas, Viedma Robles, Antonio
Format: article
Publication Date:2008
Country:España
Institution:Universidad Politécnica de Cartagena(UPCT)
Repository:Repositorio Digital UPCT
OAI Identifier:oai:repositorio.upct.es:10317/604
Online Access:http://hdl.handle.net/10317/604
Access Level:Open access
Keyword:Corrientes de convección turbulenta
Canal inclinado convergente
Correlación numérica
Número Rayleigh
Turbulent convective flows
Inclined converging channels
Numerical correlation
Fluid mechanics
Mecánica de Fluidos
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oai_identifier_str oai:repositorio.upct.es:10317/604
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spelling Numerical correlation for natural convective flows in isothermal heated, inclined and convergent channels for high Rayleigh numbersSánchez Kaiser, AntonioZamora Parra, BlasViedma Robles, AntonioCorrientes de convección turbulentaCanal inclinado convergenteCorrelación numéricaNúmero RayleighTurbulent convective flowsInclined converging channelsNumerical correlationFluid mechanicsMecánica de FluidosA numerical study of natural convective flows, mainly for high Rayleigh numbers, in a sloped converging channel, for different inclination and convergence angles has been carried out, taking into account the lacks of the literature on some aspect of this configuration. Two dimensional, laminar, transitional and turbulent simulations were obtained by solving the fully-elliptic governing equations using two different general purpose codes: Fluent and Phoenics. The low-Reynolds K-w turbulence model has been employed. Special amphasis is made on the systematic comparisons of computational results with experimental and numerical data taken from literature for turbulent regime, so as on the transitional conditions, studying the influence of Rayleigh number and channel aspect ratio. A generalized turbulent correlation for the average Nusselt number has been obtained from numerical results in a channel with isithermal hated plates, for symmetric heating conditions. This correlation is valid for wide and not yet covered ranges of Rayleigh number (based on length of the channel)varying from 10 high 10 to 10 high 16, aspect ratio between 0.03 to 0.25, the coverging angle from 1 to 30º and sloping angle from 0 to 60º. Finally, an application of this numerical correlation in two experimental prototypes is presented.This research has been supported by the Dirección General de Investigación of ministerio de Educacaión y Ciencia of Spanish Goverment, Through DPI 2003-02719 Project.Elsevier Science200920092008info:eu-repo/semantics/articleapplication/pdfapplication/pdfhttp://hdl.handle.net/10317/604reponame:Repositorio Digital UPCTinstname:Universidad Politécnica de Cartagena(UPCT)InglésCopyright © 2008 Elsevier B.V.Versión del editor: http://www.sciencedirect.com/science?_ob=ArticleListURL&_method=list&_ArticleListID=849294788&_sort=d&_st=4&_acct=C000053933&_version=1&_urlVersion=0&_userid=1595570&md5=68fdc02701228f82a4f4f810f754802binfo:eu-repo/semantics/openAccessoai:repositorio.upct.es:10317/6042026-05-15T06:39:02Z
dc.title.none.fl_str_mv Numerical correlation for natural convective flows in isothermal heated, inclined and convergent channels for high Rayleigh numbers
title Numerical correlation for natural convective flows in isothermal heated, inclined and convergent channels for high Rayleigh numbers
spellingShingle Numerical correlation for natural convective flows in isothermal heated, inclined and convergent channels for high Rayleigh numbers
Sánchez Kaiser, Antonio
Corrientes de convección turbulenta
Canal inclinado convergente
Correlación numérica
Número Rayleigh
Turbulent convective flows
Inclined converging channels
Numerical correlation
Fluid mechanics
Mecánica de Fluidos
title_short Numerical correlation for natural convective flows in isothermal heated, inclined and convergent channels for high Rayleigh numbers
title_full Numerical correlation for natural convective flows in isothermal heated, inclined and convergent channels for high Rayleigh numbers
title_fullStr Numerical correlation for natural convective flows in isothermal heated, inclined and convergent channels for high Rayleigh numbers
title_full_unstemmed Numerical correlation for natural convective flows in isothermal heated, inclined and convergent channels for high Rayleigh numbers
title_sort Numerical correlation for natural convective flows in isothermal heated, inclined and convergent channels for high Rayleigh numbers
dc.creator.none.fl_str_mv Sánchez Kaiser, Antonio
Zamora Parra, Blas
Viedma Robles, Antonio
author Sánchez Kaiser, Antonio
author_facet Sánchez Kaiser, Antonio
Zamora Parra, Blas
Viedma Robles, Antonio
author_role author
author2 Zamora Parra, Blas
Viedma Robles, Antonio
author2_role author
author
dc.subject.none.fl_str_mv Corrientes de convección turbulenta
Canal inclinado convergente
Correlación numérica
Número Rayleigh
Turbulent convective flows
Inclined converging channels
Numerical correlation
Fluid mechanics
Mecánica de Fluidos
topic Corrientes de convección turbulenta
Canal inclinado convergente
Correlación numérica
Número Rayleigh
Turbulent convective flows
Inclined converging channels
Numerical correlation
Fluid mechanics
Mecánica de Fluidos
description A numerical study of natural convective flows, mainly for high Rayleigh numbers, in a sloped converging channel, for different inclination and convergence angles has been carried out, taking into account the lacks of the literature on some aspect of this configuration. Two dimensional, laminar, transitional and turbulent simulations were obtained by solving the fully-elliptic governing equations using two different general purpose codes: Fluent and Phoenics. The low-Reynolds K-w turbulence model has been employed. Special amphasis is made on the systematic comparisons of computational results with experimental and numerical data taken from literature for turbulent regime, so as on the transitional conditions, studying the influence of Rayleigh number and channel aspect ratio. A generalized turbulent correlation for the average Nusselt number has been obtained from numerical results in a channel with isithermal hated plates, for symmetric heating conditions. This correlation is valid for wide and not yet covered ranges of Rayleigh number (based on length of the channel)varying from 10 high 10 to 10 high 16, aspect ratio between 0.03 to 0.25, the coverging angle from 1 to 30º and sloping angle from 0 to 60º. Finally, an application of this numerical correlation in two experimental prototypes is presented.
publishDate 2008
dc.date.none.fl_str_mv 2008
2009
2009
dc.type.none.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10317/604
url http://hdl.handle.net/10317/604
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.rights.none.fl_str_mv Copyright © 2008 Elsevier B.V.
info:eu-repo/semantics/openAccess
rights_invalid_str_mv Copyright © 2008 Elsevier B.V.
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier Science
publisher.none.fl_str_mv Elsevier Science
dc.source.none.fl_str_mv reponame:Repositorio Digital UPCT
instname:Universidad Politécnica de Cartagena(UPCT)
instname_str Universidad Politécnica de Cartagena(UPCT)
reponame_str Repositorio Digital UPCT
collection Repositorio Digital UPCT
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,198674

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