Free convection in a vertical channel with antisymmetrical heating is a special case that has not received a great deal of attention in the literature. Antisymmetrical heating is where the hot wall is heated above the ambient temperature by the same amount that the cold wall is cooled below the ambient, giving equal but opposing buoyancy forces inside the channel. An experimental model was constructed to study antisymmetrical heating inside an isothermally heated vertical channel. Flow visualization was used to obtain the flow field and laser interferometry was used to obtain the temperature field. Based on the measured temperature field, the local and average Nusselt numbers were determined, which were compared with numerical predictions obtained using ansys fluent. A range of Rayleigh numbers were studied for air with a Prandtl number of 0.71. The results show that an open-ended channel with antisymmetrical heating has some similarities to a tall enclosure. The average convective heat transfer can be approximated using an existing correlation for a tall enclosure from the literature.
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and Industrial Engineering,
Ryerson University,
Toronto, ON M5B 2K3,
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Research-Article
Free Convection in Antisymmetrically Heated Vertical Channels
D. Roeleveld,
D. Roeleveld
1
e-mail: droeleve@ryerson.ca
1Corresponding author.
Search for other works by this author on:
W. H. Leong
and Industrial Engineering,
Ryerson University,
Toronto, ON M5B 2K3,
W. H. Leong
Department of Mechanical
and Industrial Engineering,
Ryerson University,
350 Victoria Street
,Toronto, ON M5B 2K3,
Canada
Search for other works by this author on:
D. Roeleveld
e-mail: droeleve@ryerson.ca
W. H. Leong
Department of Mechanical
and Industrial Engineering,
Ryerson University,
350 Victoria Street
,Toronto, ON M5B 2K3,
Canada
1Corresponding author.
Contributed by the Heat Transfer Division of ASME for publication in the JOURNAL OF HEAT TRANSFER. Manuscript received March 19, 2013; final manuscript received August 16, 2013; published online October 25, 2013. Assoc. Editor: Patrick E. Phelan.
J. Heat Transfer. Jan 2014, 136(1): 012502 (7 pages)
Published Online: October 25, 2013
Article history
Received:
March 19, 2013
Revision Received:
August 16, 2013
Citation
Roeleveld, D., Naylor, D., and Leong, W. H. (October 25, 2013). "Free Convection in Antisymmetrically Heated Vertical Channels." ASME. J. Heat Transfer. January 2014; 136(1): 012502. https://doi.org/10.1115/1.4025269
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