Actions for Variable Refractive Index Effects on Radiation in Semitransparent Scattering Multilayered Regions

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Variable Refractive Index Effects on Radiation in Semitransparent Scattering Multilayered Regions

Author
Spuckler, C. M.
Published
October 1993.
Physical Description
1 electronic document
Additional Creators
Siegel, R.
Online Version

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Summary
A simple set of equations is derived for predicting the temperature distribution and radiative energy flow in a semitransparent layer consisting of an arbitrary number of laminated sublayers that absorb, emit, and scatter radiation. Each sublayer can have a different refractive index and optical thickness. The plane composite region is heated on each exterior side by a different amount of incident radiation. The results are for the limiting case where heat conduction within the layers is very small relative to radiative transfer, and is neglected. The interfaces are assumed diffuse, and all interface reflections are included in the analysis. The thermal behavior is readily calculated from the analytical expressions that are obtained. By using many sublayers, the analytical expressions provide the temperature distribution and heat flow for a diffusing medium with a continuously varying refractive index, including internal reflection effects caused by refractive index gradients. Temperature and heat flux results are given to show the effect of variations in refractive index and optical thickness through the multilayer laminate.
Other Subject(s)
Collection
NASA Technical Reports Server (NTRS) Collection.
Note
Document ID: 20150021010.
E-9815.
Journal of Thermophysics and Heat Transfer; Volume 7 ; Issue 4 ; 624-630.
Terms of Use and Reproduction
Copyright, Distribution as joint owner in the copyright.
View MARC record | catkey: 17530812