Fire Safety Science Digital Archive

Three-dimensional fire-induced air-flow, temperature and smoke concentration in an atrium is simulated and visualised. The field modelling approach employing Computational Fluid Dynamics (CFD) techniques is adopted with turbulence being modelled by the two-equations k-? model. The simulation shows that ordinary exhaust rate of 6 ACH and 10 ACH failed to hold the safe evacuation time to more than two minute. A higher exhaust rate might induce more recirculation of heated air inside the atrium space and thus is not able to remove it effectively.