Three-dimensional CFD Evaluation of the Characterizing Parameters in the Fire/Structure Interaction

With reference to a steel beam located at the ceiling of a small room irradiated by a burner located on the floor, that is the fire source, the Adiabatic Surface Temperature (AST) has been evaluated. Surface temperatures of the beam and the heat fluxes released to it (conjugate case) are then compared to those in a single beam with the AST as boundary condition (standalone case). Results show that, by assuming AST as the exchange parameter between fire and structural models, differences between conjugate and standalone case are strongly dependent on the convection coefficient assumed in the latter one.