On Radiative Transfer and Gray Body Parameter for Partially Transparent Media

K. Manuilov *

Keldysh Institute of Applied Mathematics of Russian Academy of Sciences, Miusskaya sq., 4, Moscow, 125047, Russia.

*Author to whom correspondence should be addressed.


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.

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


How to Cite

Manuilov, K. (2019). On Radiative Transfer and Gray Body Parameter for Partially Transparent Media. Physical Science International Journal, 21(3), 1–11. https://doi.org/10.9734/psij/2019/v21i330112

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