Numerical Study on Interactions of Turbulent Convection and Radiation in Compartment Fires

Abstract

A field equation model was developed for the interaction analysis of turbulent natural convection and radiation in the 'pre-flashover' compartment fire. Radiation in non-gray gases and soot mixtures was analyzed by a differential approximation method. A κ - ε model for turbulent flow was considered. The Favre (mass) averaged governing equation system was solved by an efficient iterative method incorporating a multi-dimensional simultaneous finite difference equations solver. Computations were performed on a two-dimensional room-corridor system with a localized fire source in the room. Effects of radiation on the flow and temperature fields have been identified. Soot radiation significantly altered local characteristics of the temperature field.