Experimental Study of Mixed Convection in an Enclosure with a Cold Movable Top Wall and Hot Bottom Wall

Mixed convection heat transfer to air inside an enclosure is investigated experimentally. The bottom wall of the enclosure is maintained at higher temperature than that of the top wall which keeps in oscillation motion, whereas the left and right walls are well insulated. The differential temperatur...

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Autores principales:	Ayad S. Abdulla, Dhia Al-Deen H. Alwan, Nabil J. Yasin
Formato:	article
Lenguaje:	EN
Publicado:	Al-Khwarizmi College of Engineering – University of Baghdad 2014
Materias:	Chemical engineering TP155-156 Engineering (General). Civil engineering (General) TA1-2040
Acceso en línea:	https://doaj.org/article/54af5a56e9ff4afd934047a548f98d95
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spelling	oai:doaj.org-article:54af5a56e9ff4afd934047a548f98d952021-12-02T10:53:14ZExperimental Study of Mixed Convection in an Enclosure with a Cold Movable Top Wall and Hot Bottom Wall 1818-1171https://doaj.org/article/54af5a56e9ff4afd934047a548f98d952014-03-01T00:00:00Zhttp://www.iasj.net/iasj?func=fulltext&aId=87725https://doaj.org/toc/1818-1171Mixed convection heat transfer to air inside an enclosure is investigated experimentally. The bottom wall of the enclosure is maintained at higher temperature than that of the top wall which keeps in oscillation motion, whereas the left and right walls are well insulated. The differential temperature of the bottom and top walls changed several times in order to accurately characterize the temperature distribution over a considerable range of Richardson number. Adjustable aspect ratio box was built as a test rig to determine the effects of Richardson number and aspect ratio on the flow behavior of the air inside the enclosure. The flow fields and the average Nusselt number profiles were presented in this work. The results show that, at a constant value of the Richardson number, average Nusselt number (Nuav.) increases with aspect ratio. Furthermore, as Richardson number decreases, the time period decreases Ayad S. AbdullaDhia Al-Deen H. Alwan Nabil J. Yasin Al-Khwarizmi College of Engineering – University of BaghdadarticleChemical engineeringTP155-156Engineering (General). Civil engineering (General)TA1-2040ENAl-Khawarizmi Engineering Journal, Vol 10, Iss 1, Pp 32-46 (2014)
institution	DOAJ
collection	DOAJ
language	EN
topic	Chemical engineering TP155-156 Engineering (General). Civil engineering (General) TA1-2040
spellingShingle	Chemical engineering TP155-156 Engineering (General). Civil engineering (General) TA1-2040 Ayad S. Abdulla Dhia Al-Deen H. Alwan Nabil J. Yasin Experimental Study of Mixed Convection in an Enclosure with a Cold Movable Top Wall and Hot Bottom Wall
description	Mixed convection heat transfer to air inside an enclosure is investigated experimentally. The bottom wall of the enclosure is maintained at higher temperature than that of the top wall which keeps in oscillation motion, whereas the left and right walls are well insulated. The differential temperature of the bottom and top walls changed several times in order to accurately characterize the temperature distribution over a considerable range of Richardson number. Adjustable aspect ratio box was built as a test rig to determine the effects of Richardson number and aspect ratio on the flow behavior of the air inside the enclosure. The flow fields and the average Nusselt number profiles were presented in this work. The results show that, at a constant value of the Richardson number, average Nusselt number (Nuav.) increases with aspect ratio. Furthermore, as Richardson number decreases, the time period decreases
format	article
author	Ayad S. Abdulla Dhia Al-Deen H. Alwan Nabil J. Yasin
author_facet	Ayad S. Abdulla Dhia Al-Deen H. Alwan Nabil J. Yasin
author_sort	Ayad S. Abdulla
title	Experimental Study of Mixed Convection in an Enclosure with a Cold Movable Top Wall and Hot Bottom Wall
title_short	Experimental Study of Mixed Convection in an Enclosure with a Cold Movable Top Wall and Hot Bottom Wall
title_full	Experimental Study of Mixed Convection in an Enclosure with a Cold Movable Top Wall and Hot Bottom Wall
title_fullStr	Experimental Study of Mixed Convection in an Enclosure with a Cold Movable Top Wall and Hot Bottom Wall
title_full_unstemmed	Experimental Study of Mixed Convection in an Enclosure with a Cold Movable Top Wall and Hot Bottom Wall
title_sort	experimental study of mixed convection in an enclosure with a cold movable top wall and hot bottom wall
publisher	Al-Khwarizmi College of Engineering – University of Baghdad
publishDate	2014
url	https://doaj.org/article/54af5a56e9ff4afd934047a548f98d95
work_keys_str_mv	AT ayadsabdulla experimentalstudyofmixedconvectioninanenclosurewithacoldmovabletopwallandhotbottomwall AT dhiaaldeenhalwan experimentalstudyofmixedconvectioninanenclosurewithacoldmovabletopwallandhotbottomwall AT nabiljyasin experimentalstudyofmixedconvectioninanenclosurewithacoldmovabletopwallandhotbottomwall
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Experimental Study of Mixed Convection in an Enclosure with a Cold Movable Top Wall and Hot Bottom Wall

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