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RESEARCH PAPERS

An Analytical Solution For a Planar Nongray Medium in Radiative Equilibrium

[+] Author and Article Information
C. C. Lin, S. H. Chan

Department of Mechanical Engineering, Polytechnic Institute of New York, Brooklyn, N. Y.

J. Heat Transfer 97(1), 29-34 (Feb 01, 1975) (6 pages) doi:10.1115/1.3450283 History: Received August 01, 1974; Online August 11, 2010

Abstract

The problem of energy transfer through a nongray absorbing and emitting medium, bounded by two black surfaces, in radiative equilibrium is investigated. A nearly exact analytical solution for the temperature distribution within the nongray medium is found by an asymptotic matching technique. The nongray characteristics of the medium are accounted for by using the exponential wide-band model. The analytical solution is valid for all optical thickness and has an error of less than 0.5 percent as compared to the existing numerical solution.

Copyright © 1975 by ASME
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