Analysis of the indoor fire risk based on the Pyrosim simulation

Abstract

In order to study the effects of different fire conditions on the indoor fire process, this paper uses Pyrosim to perform a fire simulation of a simple indoor room in the paper, we have compared and analyzed the changes of the temperature, the smoke layer height, and the heat flow in two different conditions with the window and door being open, or with the window closed but the door opened 30 seconds later after the fire broke out. Pyrosim simulation results show that in the first 30 seconds of the fire outbreak, the fire development has nothing to do with the opening and closing of doors and windows. In the middle and late stages of the fire, when the door and window are fully open, the temperature and heat flow of the simulated room are low, and the height of the smoke layer from the ground is high. In the simulated room, with the window closed and the door opened after 30 seconds, the maximum temperature in the simulated room was about 10 higher than that in Condition 1.