Application de la méthode des ordonnées discrètes au transfert radiatif dans un milieu bidimensionnel gris á géométrie complexe

Abstract

Application of the discrete method to the radiative heat transfer in a two-dimensional grey medium of complex geometry. This paper describes a new approach in determining the radiative intensity and the temperature fields in a semi-transparent medium enclosed in a two-dimensional cavity the boundary surfaces of which are uniformly grey and purely isotropic diffuse reflectors, with the help of a new combination of ray tracing, finite volumes and discrete ordinates method. Since the grid used can be unstructured, the technique is applicable to the calculation of radiative transfer in enclosures of complex geometry. The basic equations are given, followed by results for cases of simple geometry compared with the exact solutions and the treatment of other cases of more complex geometry. The method eliminates oscillations in the intensity field and yields accurate results.