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Natural convection in a quadrantal cavity heated and cooled on adjacent walls / Orhan Aydin in Journal of heat transfer, Vol. 133 N° 5 (Mai 2011) 

Public ISBD [article]  in Journal of heat transfer > Vol. 133 N° 5 (Mai 2011) . - pp. [052501/1-7] Titre : Natural convection in a quadrantal cavity heated and cooled on adjacent walls Type de document : texte imprimé Auteurs : Orhan Aydin, Auteur ; Gurkan Yesiloz, Auteur Année de publication : 2011 Article en page(s) : pp. [052501/1-7] Note générale : Physique Langues : Anglais (eng) Mots-clés : Natural  convection  Quadrantal  cavity  Particle  tracing  method  Singularity Index. décimale : 536 Chaleur. Thermodynamique Résumé : In this study, experimental and numerical analyses of natural convection in a quadrantal cavity heated and cooled on adjacent walls have been made to examine heat and fluid flow. Experimental studies involve the use of the particle tracing method that enables us to visualize the flow pattern in the enclosure. Numerical solutions are obtained using a commercial computational fluid dynamics package, FLUENT, using the finite volume method. Water is used as the working fluid. Effects of the Rayleigh number, Ra, on the Nusselt number, Nu, as well as velocity and temperature fields are investigated for the range of Ra from 103 to 107. A new approach is suggested to overcome the singularity at the corner joining the differentially heated isothermal walls when determining Nu. This novel approach is justified through the purely analytical conduction solution. The experimental and numerical results are shown to agree fairly well. Finally, a correlation for Nu is developed. DEWEY : 536 ISSN : 0022-1481 En ligne : http://asmedl.aip.org/vsearch/servlet/VerityServlet?KEY=JHTRAO&ONLINE=YES&smode= [...] [article] Natural convection in a quadrantal cavity heated and cooled on adjacent walls [texte imprimé] / Orhan Aydin, Auteur ; Gurkan Yesiloz, Auteur . - 2011 . - pp. [052501/1-7]. Physique Langues : Anglais (eng) in Journal of heat transfer > Vol. 133 N° 5 (Mai 2011) . - pp. [052501/1-7] Mots-clés : Natural  convection  Quadrantal  cavity  Particle  tracing  method  Singularity Index. décimale : 536 Chaleur. Thermodynamique Résumé : In this study, experimental and numerical analyses of natural convection in a quadrantal cavity heated and cooled on adjacent walls have been made to examine heat and fluid flow. Experimental studies involve the use of the particle tracing method that enables us to visualize the flow pattern in the enclosure. Numerical solutions are obtained using a commercial computational fluid dynamics package, FLUENT, using the finite volume method. Water is used as the working fluid. Effects of the Rayleigh number, Ra, on the Nusselt number, Nu, as well as velocity and temperature fields are investigated for the range of Ra from 103 to 107. A new approach is suggested to overcome the singularity at the corner joining the differentially heated isothermal walls when determining Nu. This novel approach is justified through the purely analytical conduction solution. The experimental and numerical results are shown to agree fairly well. Finally, a correlation for Nu is developed. DEWEY : 536 ISSN : 0022-1481 En ligne : http://asmedl.aip.org/vsearch/servlet/VerityServlet?KEY=JHTRAO&ONLINE=YES&smode= [...]