“…Primary air has a Reynolds number of 14474, while secondary air has a number of 3331. The verification of the turbulence and burning model has been detailed in the previous paper by Rassai et al [ 27 ], the results of CFD are verified with the measured results from experimental data, and the study reveals firstly that the RKE model is the more accurate in comparison with other models (Standard and RNG) and secondly that the non-premixed combustion model gives satisfactory outcomes for emissions (CO 2 , CO, H 2 O, and O 2 ) and gas temperature. Therefore, our numerical model is valid, and we can use it for this study to model the gas combustion phenomena.…”