Finding the position of the neutral layer from the bottom of the opening of the enclosure and also calculating the mass flow rates into an out of the opening of the enclosure.
A fire in an enclosure has reached flashover, and the gas temperature is assumed to be uniform at 1000 o C. The enclosure has an opening 3 m wide and 2 m high. Work out (a) the position of the neutral layer, measured from the bottom of the opening. (b) Mass flow rates into an out of the opening.