Experimental Study on the Impact of External Geometrical Shape on Free and Forced Convection Time Dependent Average Heat Transfer Coefficient during Cooling Process

In this research, an experimental study was conducted to high light the impact of the exterior shape of a cylindrical body on the forced and free convection heat transfer coefficients when the body is hold in the entrance of an air duct. The impact of changing the body location within the air duct...

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Main Author: Sundus Hussein Abd
Format: Article
Language:English
Published: Al-Khwarizmi College of Engineering – University of Baghdad 2012-12-01
Series:Al-Khawarizmi Engineering Journal
Subjects:
Online Access:http://alkej.uobaghdad.edu.iq/index.php/alkej/article/view/149
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spelling doaj-666b4a2bd86e463b916bbccb6a41c9a82020-11-25T01:08:57Zeng Al-Khwarizmi College of Engineering – University of BaghdadAl-Khawarizmi Engineering Journal1818-11712312-07892012-12-0184Experimental Study on the Impact of External Geometrical Shape on Free and Forced Convection Time Dependent Average Heat Transfer Coefficient during Cooling ProcessSundus Hussein Abd0Department of Mechanical Engineering/ University of Technology In this research, an experimental study was conducted to high light the impact of the exterior shape of a cylindrical body on the forced and free convection heat transfer coefficients when the body is hold in the entrance of an air duct. The impact of changing the body location within the air duct and the air speed are also demonstrated. The cylinders were manufactured with circular, triangular and square sections of copper for its high thermal conductivity with appropriate dimensions, while maintaining the surface area of all shapes to be the same. Each cylinder was heated to a certain temperature and put inside the duct at certain locations. The temperature of the cylinder was then monitored. The heat transfer coefficient were then calculated for forced convection for several Reynolds number (4555-18222).The study covered free convection impact for values ​​of Rayleigh number ranging between (1069-3321). Imperical relationships were obtained for all cases of forced and free convection and compared with equations of circular cylindrical shapes found in literature. These imperical equations were found to be in good comparison with that of other sources. http://alkej.uobaghdad.edu.iq/index.php/alkej/article/view/149heat transferfree convectionforce convectioncircular cylindersquare cylindertriangular cylinder
collection DOAJ
language English
format Article
sources DOAJ
author Sundus Hussein Abd
spellingShingle Sundus Hussein Abd
Experimental Study on the Impact of External Geometrical Shape on Free and Forced Convection Time Dependent Average Heat Transfer Coefficient during Cooling Process
Al-Khawarizmi Engineering Journal
heat transfer
free convection
force convection
circular cylinder
square cylinder
triangular cylinder
author_facet Sundus Hussein Abd
author_sort Sundus Hussein Abd
title Experimental Study on the Impact of External Geometrical Shape on Free and Forced Convection Time Dependent Average Heat Transfer Coefficient during Cooling Process
title_short Experimental Study on the Impact of External Geometrical Shape on Free and Forced Convection Time Dependent Average Heat Transfer Coefficient during Cooling Process
title_full Experimental Study on the Impact of External Geometrical Shape on Free and Forced Convection Time Dependent Average Heat Transfer Coefficient during Cooling Process
title_fullStr Experimental Study on the Impact of External Geometrical Shape on Free and Forced Convection Time Dependent Average Heat Transfer Coefficient during Cooling Process
title_full_unstemmed Experimental Study on the Impact of External Geometrical Shape on Free and Forced Convection Time Dependent Average Heat Transfer Coefficient during Cooling Process
title_sort experimental study on the impact of external geometrical shape on free and forced convection time dependent average heat transfer coefficient during cooling process
publisher Al-Khwarizmi College of Engineering – University of Baghdad
series Al-Khawarizmi Engineering Journal
issn 1818-1171
2312-0789
publishDate 2012-12-01
description In this research, an experimental study was conducted to high light the impact of the exterior shape of a cylindrical body on the forced and free convection heat transfer coefficients when the body is hold in the entrance of an air duct. The impact of changing the body location within the air duct and the air speed are also demonstrated. The cylinders were manufactured with circular, triangular and square sections of copper for its high thermal conductivity with appropriate dimensions, while maintaining the surface area of all shapes to be the same. Each cylinder was heated to a certain temperature and put inside the duct at certain locations. The temperature of the cylinder was then monitored. The heat transfer coefficient were then calculated for forced convection for several Reynolds number (4555-18222).The study covered free convection impact for values ​​of Rayleigh number ranging between (1069-3321). Imperical relationships were obtained for all cases of forced and free convection and compared with equations of circular cylindrical shapes found in literature. These imperical equations were found to be in good comparison with that of other sources.
topic heat transfer
free convection
force convection
circular cylinder
square cylinder
triangular cylinder
url http://alkej.uobaghdad.edu.iq/index.php/alkej/article/view/149
work_keys_str_mv AT sundushusseinabd experimentalstudyontheimpactofexternalgeometricalshapeonfreeandforcedconvectiontimedependentaverageheattransfercoefficientduringcoolingprocess
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