Radiation-Natural Convection Interactions in Two-Dimensional Complex Enclosures

[+] Author and Article Information
L. C. Chang, K. T. Yang, J. R. Lloyd

Department of Aerospace and Mechanical Engineering, University of Notre Dame, Notre Dame, Ind. 46556

J. Heat Transfer 105(1), 89-95 (Feb 01, 1983) (7 pages) doi:10.1115/1.3245564 History: Received February 16, 1982; Online October 20, 2009


A numerical finite-difference study has been carried out for the two-dimensional radiation-natural convection interaction phenomena in square enclosures with equal vertical finite-thickness partitions located at the centers of the ceiling and floor. Both participating gases (CO2 and NH3 ) and nonparticipating gas (air) are considered. In the radiation calculations, the nongray exponential wide-band models for CO2 and NH3 are used, together with a radial flux method utilizing a more realistic polar description for the radiation exchange in the enclosure. Results on the effects of both surface and gas radiation on the velocity and temperature fields and the overall heat transfer rates as functions of the partition heights at two levels of the Grashof number are presented and discussed in terms of the physical phenomena.

Copyright © 1983 by ASME
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