Calculations of wall fire spread in an enclosure

Mathematical models of fire growth in enclosures offer a potential for assessing the risk of materials with respect to a hazard such as flashover. A mathematical zone model for calculating fire spread over wall lining materials within an enclosure is presented. The local wall flame spread rate and burning rate per unit area are expressed in the model as functions of the external radiation incident upon the burning surface and the oxygen concentration in the adjacent gas layer (zone). Flame spread is limited to the horizontal direction. Results for a fictitious wall lining material are presented. Major elements of the results are shown to be in qualitative agreement with experience