Author(s)

P. Koniorczyk & J. Zmywaczyk

Abstract

Heat transfer by simultaneous conduction and radiation in an optical thick and scattering medium is considered. Consideration is given to a cylindrical coordinate system consisting of two infinite, isothermal, parallel plates separated by a finite distance. The space between the plates is filled with a selected plastic. The thermal conductivity X of it consists of two components: the phonon Kc = const and the radiative Kr thermal conductivity. The Rosseland's diffusion model of radiation - conduction heat transfer to determine the extinction coefficient E is applied. Dependence of thermal conductivity X and extinction coefficient E on sample thickness / has been taken into consideration. The problem is formulated in terms of a nonlinear differential equation and the numerical calculations of ste

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