Numerical solutions of radiative heat transfer in combustion systems using a parallel modified discrete ordinates method and several recent formulations of WSGG model

The aim of the paper is to perform 3D radiative transfer calculations in combustion gas mixtures. For this purpose, a parallel modified Discrete Ordinates Method with cell-vertex formulation on unstructured tetrahedral grid proposed for solving Radiative Transfer Equation (RTE) realistic geometries. Several recent formulations weighted-sum-of-gray-gases (WSGG) model are implemented. To reduce false scattering, combined an Exponential scheme and compared Step scheme. results then published non-isothermal non-homogeneous use non-gray WSGG models shows very good level accuracy evaluation wall heat source. more accurate than summation over wavenumber spectrum usually carried out after having computed quantities each discrete angular direction. By summing first spectrum, reduction computation time significantly obtained, up factor 16 case study. Also, additionnal significant speedup obtained efficient distributed multi-threaded algorithm. When used, increases slightly number gray gases. procedure speed can be applied any arbitrary numerical method spectral RTE.