Indoor fires are quite dangerous

claiming many casualties and resulting in great property loss.Using Computational Fluid Dynamics(CFD)

a three-dimensional large eddy simulation model of smoke flow is set up.Through the simulation of smoke flow

the theoretical basis is provided for controlling a fire in multiple rooms

thereby saving people.The results of simulation show that high temperatures and thick smoke exist near the fire

and the probability of combusting other tinder will increase.Moreover

there are close relationships between fire and ventilation.The latter can lower the average temperature and speed up the spread of smoke flow and toxic gases

providing conditions for the further development of indoor fire.Moreover

from both the simulated calculation and physical measurement

it is shown that indoor fires and their temperature distribution and smoke concentration are influenced by the fire power and the room size.The results from calculation and measurement are quite consistent.