Large Eddy Simulation of Pool Fire using FGM Combustion Model and Compared with Other Combustion Models

Among the experimental and numerical studies conducted in the field of fire, the pool fire has been welcomed more than other fire scenarios. In this paper, pool fire is studied to investigate the effect of different combustion models on the fire simulation. For this purpose, the combination model of flamelet generated manifold (FGM) is used and its results are compared with three infinite fast chemistry (IFC), eddy dissipation (EDM) and eddy dissipation concept (EDC) combustion models. By comparing the mean velocity results and its fluctuations, it is observed that the accuracy of the FGM combination model, regardless of radiation effect, is better than other combustion models in predicting of the puffing phenomenon and its frequency, the mean square of vertical velocity, mean turbulence kinetic energy. For example, the FGM combustion model has less than 3% relative error with experimental results in prediction of the puffing frequency; but other combustion models are more than 10% relative error. In the prediction of the mean velocity field, the EDM combustion model has a higher accuracy than the FGM.