RECENT ADVANCE IN RAY-TRACING/NODAL-ANALYZING METHOD FOR RADIATIVE HEAT TRANSFER INSIDE A SCATTERING MEDIUM

摘要

False scattering and ray effect don’t exit in the ray-tracing/nodal-analyzing method. So, its accuracy is high theoretically. This method is suitable for different optical boundary conditions, different reflecting modes of boundary surfaces and different scattering characteristics of the considered medium. However, radiative transfer in the medium with one specular surface and one diffuse surface (S-D surfaces) has not been solved. Using the ray-tracing/nodal-analyzing method, radiative transfer in an isotropic scattering multilayered medium has been investigated; but the problem in an anisotropic scattering composite has not been solved yet. In this paper, a new ray tracing method is put forward for the radiative transfer in the medium with S-D surfaces; and the radiative transfer model for single anisotropic scattering layer is extended to composite layers; lastly, using multilayer radiative transfer functions, a radiative transfer model for a medium with arbitrary distributions of physical property parameters, such as refractive index, attenuation coefficient, and scattering albedo, is deduced.