20.500.12556/DiRROS-31169 Large eddy simulations of ventilation-limited compartment fire scenarios using a new dynamic flame extinction and re-ignition model in FDS Large 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. flame extinction flame re-ignition under-ventilated conditions CFD modelling FDS ugasnitev plamena ponovno vžiganje plamena požar v zaprtem prostoru pogoji z nezadostnim prezračevanjem CFD-modeliranje FDS true false true Elsevier Ltd. Angleški jezik Slovenski jezik Neznano 2026-07-17 11:57:41 2026-07-17 12:02:16 2026-07-18 03:45:03 0000-00-00 00:00:00 2026 0 0 This article is part of a Special issue entitled ‘Fires in infrastructures’ ... str. 1-13 [article no.] 100532 Vol. 27 Sep. 2026 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 2026-06-27 614.84 2666-352X 10.1016/j.jaecs.2026.100532 283738371 https://doi.org/10.1016/j.jaecs.2026.100532 0 f4ddcb94-81c5-11f1-a19f-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=48077 RAZ_Floyd_Jason_2026.pdf RAZ_Floyd_Jason_2026.pdf 1 5FBBB1EDECCEECF0E6BA7591B75712B9 c92a976cd80c50b280afc86f63e5d2898f70bf8f1e7c64475e847ff940bdb29e 8464fab3-81c6-11f1-a19f-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=48078 Zavod za gradbeništvo Slovenije 0 0 0