Large eddy simulations of ventilation-limited compartment fire scenarios using a new dynamic flame extinction and re-ignition model in FDSMaragkos, Georgios (Korespondenčni avtor) Floyd, Jason (Avtor) Lucherini, Andrea (Avtor) Snegirev, Alexander (Avtor) Igweh, Elijah Jerome (Avtor) Merci, Bart (Avtor) flame extinctionflame re-ignitionunder-ventilated conditionsCFD modellingFDSLarge eddy simulations of ventilation-controlled compartment fire scenarios conducted with FDS and new dynamic extinction and re-ignition models are presented. Flame extinction is modelled considering an enthalpy balance, based on a critical flame temperature, while re-ignition is allowed if the local resolved temperature exceeds a given re-ignition temperature. The re-ignition temperatures are estimated on the basis of counterflow simulations with hot oxidizers at different strain rates. The determination of the critical flame temperatures is made through well-stirred reactor simulations under different residence times and diluent types/concentrations. The new models are applied in reduced-scale ventilation-limited compartment fire scenarios with variable heat release rate. Comparison against the original model of FDS, relying on constant critical flame and re-ignition temperatures, are made. Overall, the predictions with the new dynamic models agree both qualitatively and quantitatively with the experiments. By considering the local properties of the flow, the new models bring some improvements, compared to the original models of FDS, in particular for the O concentrations inside the compartment in ventilation-controlled conditions.Elsevier Ltd.20262026-07-17 11:57:41Neznano31169UDK: 614.84ISSN pri članku: 2666-352XDOI: 10.1016/j.jaecs.2026.100532COBISS_ID: 283738371sl