RIGOROUS DEVELOPMENT FOR RADIATION HEAT-TRANSFER IN NONHOMOGENEOUS ABSORBING, EMITTING AND SCATTERING MEDIA

In this study, a comprehensive methodology is developed for computing the radiative emission of a generalized enclosure containing an absorbing, emitting, scattering medium. The principle of reciprocity in radiative transfer provides the basis for a reverse Monte Carlo solution for the emission. The result is an approach founded upon complete paths through the enclosure. These paths constitute a generalization of the line-of-sight concept to include the effects of scattering and boundary reflection. Line-of-sight based models for gas absorption can then be incorporated without approximation. Sample results for the emission from a nonhomogeneous, nonisothermal cylindrical medium containing gray particles and a real gas are included.