Comparative study of FireFOAM and FDS in reduced scale well-ventilated compartment fire scenarios
Résumé
Abstract The paper focuses on large eddy simulations of reduced scale well-ventilated compartment fire scenarios and aims to evaluate the performance of the current modelling capabilities of FireFOAM and FDS in terms of simulating the fire dynamics and smoke transport encountered in such circumstances. To this purpose, a qualitative and quantitative comparison of the two CFD codes as a function of grid size, considering different fire sizes under the same ventilation flow rate, is reported in the study. There are obvious differences between the predictions of the two CFD codes. More specifically, FireFOAM predicts better the fire plume dynamics with significantly lower grid dependency. On the other hand, FDS predicts slightly better the smoke layer temperatures for all the grid sizes considered. The observed deviations between the codes are mainly attributed to differences in the modelling options which affect the predicted flame temperature and structure, the radiation emission, as well as the predicted flow rates of fresh air inside the enclosure from the admission branch.
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