Simulation and analysis of indoor gas leakage

The indoor fire induced by gas leakages can cause a lot of property losses and fatalities. One of the  primary fire reasons is the explosion caused by the leaked gas concentrated within the explosive limits and an ignition source offered. In the paper, the characteristics of indoor gas leakages are disscussed and the theoretical models of the release rate and diffusion of gas are presented firstly. And then, the gas leakage in a room of a residential building is numerically simulated based on the application of computational fluid dynamics (CFD) techniques. Under different boundary conditions, the regions of concentrations within the explosive limits in the room are displayed and analyzed. Finally, the influences by the release rate of gas leakages and the velocity of outdoor air flows are studied. The analysis theoretically contributes a lot to fire prevention and control.