Parallelisation of the discrete transfer radiation model

The transfer of energy by thermal radiation represents an important component in many reacting flows. Thus, when radiative energy exchange is included in a complete, parallel CFD simulation of such systems, the relatively large computational expense of evaluating this complex process demands efficient parallelisation of the radiation sub-model. This article investigates the parallelisation of the discrete transfer radiation model, paying particular attention to different solutions to the radiative transfer equation. Speed-up efficiencies of a constant absorption coefficient solution, a weighted sum of gray gases solution, and a differential total absorptivity solution are compared across a non-uniform mixture of combustion gases and soot