@Article{, title={Application of LES/PDF and RANS/PDF approaches for simulation of spray combustion}, author={Ahmed A. Majhool and Duaa Y. Haran}, journal={Al-Qadisiyah Journal for Engineering Sciences مجلة القادسية للعلوم الهندسية}, volume={14}, number={2}, pages={0104-0111}, year={2021}, abstract={This paper is addressing of a coupling Large-eddy simulation (LES) and RANS turbulence models with mixture fraction/probability density function as a combustion model. The two models have been implemented to simulate ethanol-air spray combustion. The gas phase is described with the Eulerian approach while the liquid phase is designed using a Lagrangian framework. The LES/PDF approach is obtained statistically. The sub-grid scale energy equation is used with the LES/PDF approach. The numerical results are validated with experimental data. Both LES/PDF and RANS/PDF approaches are compared with the experimental data. The LES/PDF approach shows good agreement in predicting the average gas temperature compared with RANS/PDF approach. The LES/PDF shows a better prediction of both turbulence intensity profiles and the vortices which are generated in the turbulent flow in comparison with the RANS/PDF approach.

} }