Parallel Computations of Nongray Radiative Heat Transfer

ABSTRACT Nongray radiative transfer calculations are demonstrated on parallel computers by spatially decomposing the discrete ordinates method to solve the radiative transport equation (RTE). The predictions from coupling different property models with the RTE are compared against benchmarks for model problems. A validation metric is employed to quantify the agreement with the benchmarks. The weighted-sum-of-gray-gases model, and Patch mean absorption coefficients extracted from a narrow-band model (RADCAL), gave the most accurate results. However, the shortcomings of employing these two models in a combustion simulation are recognized. The robustness of the parallel algorithm is demonstrated through scaling studies.