Eventos Anais de eventos
COBEM 2023
27th International Congress of Mechanical Engineering
NUMERICAL STUDY ON THE LIKELIHOOD OF IGNITION OF MATERIALS NEARBY COLLAPSED COMPARTMENT WALLS DURING DWELLINGS' FIRES
Submission Author:
Rodolfo Prediger Helfenstein , RS
Co-Authors:
Rodolfo Prediger Helfenstein, Calisa Lemmertz, Felipe Roman Centeno
Presenter: Rodolfo Prediger Helfenstein
doi://10.26678/ABCM.COBEM2023.COB2023-0334
Abstract
A full-scale ISO 9705 room was numerically modelled to verify the changes in fire dynamics resulting from the collapse of a compartment wall and its influence on combustible materials close to the structure. The results showed that the wall collapse promoted changes in the dwelling fire regime due to the air inflow and smoke outflow, which stimulated the fire burning for cases of high and medium fire load, and, together with the reduction of the HGL thickness, a decrease in ambient temperature. The incident radiative heat flux has a behaviour inversely proportional to the distance from the compartment, presenting more uniform values as the distance from the compartment increases. Considering different heights, the highest heat flux was measured from the middle to the top of the compartment, according to the characteristics imposed by the fire load. From the comparison between the results of this work and the critical heat flux and distance presented in the literature, it was evident that when considering a medium fire load, the separation distance of 2.14 m presents a high risk of fire spread, and the distance of 3.14 m is still less than necessary.
Keywords
Fire Dynamics Simulator, fire spread, Compartment fires, Informal settlements dwellings
