Prediction of the effect of breaking window in a double skin façade as a result of fire

It is necessary for fire safety that in case of a flash-over situation, the windows in the outer skin would break very fast and before the windows in the inner façade would break, so that the model of Law is valid in which case the NEN 6068  could  be  applied. The wind blows towards the building for  a  worst- case situation. Computational Fluid Dynamics (2D) is used for calculating convective heat transfers assuming a specific heat source for the fire. WINFIRE is used for the predicting  of  radiation. Due to convection and radiation the temperature in the windows would rise and the window will eventually break. As a result we predicted that the obstructed outer skin would break within 10 seconds and a non-obstructing flashover situat on will be left. Hence, the NEN 6068 can be applied.