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Abstract
The discrete transfer method was parallelized and applied to the calculation of radiative heat transfer in 2D and 3D enclosures containing a gray emitting-absorbing and isotropically scattering medium. Two different parallel strategies were used, the ray domain decomposition and the spatial domain decomposition. Three test cases were considered, and the influence of the number of processors, angular and spatial discretizations, absorption coefficient of the medium and emissivity of the boundaries on the parallel performance was investigated. It is shown that the ray decomposition is the most efficient method, mainly because the convergence rate is not influenced by the number of processors.