COMBINED RADIATIVE -CONDUCTIVE HEAT TRANSFER IN TWODIMENSIONAL COMPLEX GEOMETRIES WITH VARIABLE THERMAL CONDUCTIVITY

Abstract

This article deals with a simple Cartesian practical method named blocked-offprocedure to study the steady state combined conductive-radiative heat transfer in two-dimensionalirregular geometries. Using this technique, both straight and curvilinear boundaries can be treated.The finite-volume method is employed to solve the energy equation and the discrete ordinatesmethod (DOM) is used to solve the radiative transfer equation (RTE) to obtain the temperature andradiative-conductive heat flux distributions inside the participating medium. The walls ofenclosures are opaque, diffuse and gray with specified temperatures. The medium was consideredto be absorbing-emitting and isotropic scattering with variable thermal conductivity. In the case ofconstant thermal conductivity, results have been compared with those reported in the literature.The major part of this work is to investigate the effects of variable thermal conductivity on thethermal characteristics of radiative-conductive systems.