Fire Safety Science Digital Archive

Until now, very few works have been devoted to the prediction of the flame structure resulting from the combustion of a vertical burning wall adjacent to a rectangular pool fire at the floor level. We describe the application of a three-dimensional model to the prediction of the aerodynamic field and the thermal structure using a finite volume method for solving the fluid dynamic equations. The model employs a two-equations k-? turbulence model. The gas phase, non-premixed combustion process is modeled via the conservated scalar/prescribed density function approach. We also incorporated our parabolized numerical technique into a turbulent diffusion flame model to predict the pyrolysis rate and buoyancy-induced flow between vertical parallel burning walls. The strong coupling of the pyrolysis rate and wall fire-induced flow, in parallel configuration, is for the first time modeled, by including the effects of the streamwise pressure gradient. Transport equations for momentum, mass, gas-phase mixture fraction and enthalpy are solved using a finite volume method. A two-dimensional adaptation of the Discrete Ordinates Method is used for estimating the flame radiation energy to the burning wall. Soot model is also included in order to permit application to radiative heat transfer within a flame.