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Natural convection in an enclosure containing a sinusoidally heated cylindrical source

Roslan, Rozaini and Saleh, H. and Hashim, I. and Bataineh, A.S. (2013) Natural convection in an enclosure containing a sinusoidally heated cylindrical source. International Journal of Heat and Mass Transfer, 70. pp. 119-127. ISSN 00179310


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The problem of unsteady natural convection induced by a temperature difference between a cold outer square enclosure and a hot inner circular cylinder is studied in this paper. The cylinder temperature is assumed to vary sinusoidally with time about a fixed mean temperature. The coupled momentum and energy equations have been solved ~iumericallyo ver a wide range of values of the amplitude and the frequency of the source temperature signal, as well as the source radius. It 1s found that the heat transfer rate tends to increase by oscillating the source temperature signal. The maximum heat transfer augmentation was obta~nedfo r frequency between 25x and 30n for a high amplitude and a moderate source radius.

Item Type: Article
Uncontrolled Keywords: natural convection; square enclosure; inner cylinder
Subjects: T Technology > TA Engineering (General). Civil engineering (General) > TA349-359 Mechanics of engineering. Applied mechanics
Divisions: Faculty of Applied Science and Technology > Department of Science and Mathematics
Depositing User: Normajihan Abd. Rahman
Date Deposited: 03 Dec 2013 03:08
Last Modified: 21 Jan 2015 08:29
URI: http://eprints.uthm.edu.my/id/eprint/4571
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