Prediction of Gas and Pollutant Distributions in a Ventilated Cell in Case of Fire

Previous full scale experiments gave us a global and qualitative understanding of the gas circulation in a ventilated room in case of fire. In order to go thoroughly in the knowledge of these phenomena, we have built a scale model to perform more precise temperature measurements and more complete tracer gas experiments. The results show the existence of two zones when the air inlet is near the floor. At the opposite, when it is near the ceiling the room can be considered as a one single zone. Moreover, these experiments allow us to calculate the different exchange flow rates in the cell which are taken into account in the two-zones models. Finally, a few experimental conditions have been simulated with a two-zones fire model, Flamme-S, and comparisons with experimental results are presented.