Natural convection in an enclosure containing a sinusoidally heated cylindrical source
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...
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Elsevier
2013
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| Capaian Atas Talian: | http://dx.doi.org/10.1016/j.ijheatmasstransfer.2013.10.011 http://dx.doi.org/10.1016/j.ijheatmasstransfer.2013.10.011 http://eprints.uthm.edu.my/4571/4/rozaini_roslan_2_U_online.pdf |
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| Ringkasan: | 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. |
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