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RESEARCH PAPERS

Heat Transfer by Combined Conduction and Radiation Between Concentric Spheres Separated by Radiating Medium

[+] Author and Article Information
R. Viskanta, R. L. Merriam

School of Mechanical Engineering, Purdue University, Lafayette, Ind.

J. Heat Transfer 90(2), 248-255 (May 01, 1968) (8 pages) doi:10.1115/1.3597493 History: Received February 02, 1967; Online August 25, 2011

Abstract

Steady-state heat transfer by simultaneous conduction and radiation through a spherical shell of absorbing, emitting, and scattering medium has been investigated analytically. The medium is confined between two gray, diffuse, isothermal spheres kept at different but uniform temperatures and is capable of generating heat. The problem is formulated rigorously using exact radiative transfer methods. The governing equations were solved numerically using an iterative scheme. The results reported illustrate the interaction of conduction with radiation heat transfer as well as reveal the effects of the parameters on the heat transfer characteristics. A simple approximation is suggested for predicting total heat transfer through a spherical shell from the results through a plane layer. The results are compared with available solutions and super position approximations.

Copyright © 1968 by ASME
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