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 temp...

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Autores principales:	Nabil J. Yasin J. Yasin, Dhia Al-Deen H. Alwan, Ayad S. Abdulla
Formato:	article
Lenguaje:	EN
Publicado:	Al-Khwarizmi College of Engineering – University of Baghdad 2017
Materias:	Mixed convection Experimental Aspect ratio Enclosure Oscillating motion Chemical engineering TP155-156 Engineering (General). Civil engineering (General) TA1-2040
Acceso en línea:	https://doaj.org/article/c665e4ae3e384e57937bfeb076f4ff34
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spelling	oai:doaj.org-article:c665e4ae3e384e57937bfeb076f4ff342021-12-02T03:16:18ZExperimental Study of Mixed Convection in an Enclosure with a Cold Movable Top Wall and Hot Bottom Wall1818-11712312-0789https://doaj.org/article/c665e4ae3e384e57937bfeb076f4ff342017-12-01T00:00:00Zhttp://alkej.uobaghdad.edu.iq/index.php/alkej/article/view/189https://doaj.org/toc/1818-1171https://doaj.org/toc/2312-0789 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 with constant values of aspect ratio. Nabil J. Yasin J. YasinDhia Al-Deen H. AlwanAyad S. AbdullaAl-Khwarizmi College of Engineering – University of BaghdadarticleMixed convectionExperimentalAspect ratioEnclosureOscillating motionChemical engineeringTP155-156Engineering (General). Civil engineering (General)TA1-2040ENAl-Khawarizmi Engineering Journal, Vol 10, Iss 1 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Mixed convection Experimental Aspect ratio Enclosure Oscillating motion Chemical engineering TP155-156 Engineering (General). Civil engineering (General) TA1-2040
spellingShingle	Mixed convection Experimental Aspect ratio Enclosure Oscillating motion Chemical engineering TP155-156 Engineering (General). Civil engineering (General) TA1-2040 Nabil J. Yasin J. Yasin Dhia Al-Deen H. Alwan Ayad S. Abdulla 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 with constant values of aspect ratio.
format	article
author	Nabil J. Yasin J. Yasin Dhia Al-Deen H. Alwan Ayad S. Abdulla
author_facet	Nabil J. Yasin J. Yasin Dhia Al-Deen H. Alwan Ayad S. Abdulla
author_sort	Nabil J. Yasin J. Yasin
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	2017
url	https://doaj.org/article/c665e4ae3e384e57937bfeb076f4ff34
work_keys_str_mv	AT nabiljyasinjyasin experimentalstudyofmixedconvectioninanenclosurewithacoldmovabletopwallandhotbottomwall AT dhiaaldeenhalwan experimentalstudyofmixedconvectioninanenclosurewithacoldmovabletopwallandhotbottomwall AT ayadsabdulla experimentalstudyofmixedconvectioninanenclosurewithacoldmovabletopwallandhotbottomwall
_version_	1718401883603730432

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

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