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Research Article Open access CC BY 4.0

On Radiative Transfer and Gray Body Parameter for Partially Transparent Media

K. Manuilov

Physical Science International Journal · pp. 1–11 · Published 30 Mar 2019

10.9734/psij/2019/v21i330112

Abstract

We obtained a solution to radiative heat transfer equations, which describes a multi-layer gray semi-transparent medium in terms of an opaque body. It is shown that the thermal disturbance between the layers of a medium qualitatively changes its optical properties. We introduced a gray body parameter, which allowed us to describe multilayer gray semi-transparent media with low thermal conductivity. We propose a method for calculating heat transfer by thermal radiation in a gray semi-transparent medium and present the results of radiative heat transfer calculations for screen-vacuum and powder insulation materials as examples of such media.

Semi-transparent medium radiative heat transfer generalized blackness coefficient screen-vacuum thermal insulation

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