RESEARCH PAPERS: Radiative Transfer

Refractive Index Effects on Radiation in an Absorbing, Emitting, and Scattering Laminated Layer

[+] Author and Article Information
R. Siegel, C. M. Spuckler

NASA Lewis Research Center, Cleveland, OH 44135

J. Heat Transfer 115(1), 194-200 (Feb 01, 1993) (7 pages) doi:10.1115/1.2910648 History: Received April 13, 1992; Revised July 23, 1992; Online May 23, 2008


A simple set of equations is derived for predicting temperature distributions and radiative energy flow in a two-region semitransparent laminated layer in the limit of zero heat conduction. The composite is heated on its two sides by unequal amounts of incident radiation. The two layers of the composite have different refractive indices, and each material absorbs, emits, and isotropically scatters radiation. The interfaces are diffuse, and all interface reflections are included. To illustrate the thermal behavior that is readily calculated from the equations, typical results are given for various optical thicknesses and refractive indices of the layers. Internal reflections have a substantial effect on the temperature distribution and radiative heat flow.

Copyright © 1993 by The American Society of Mechanical Engineers
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