Fire Safety Science Digital Archive

A prediction of the thermal response of a steel beam installed beneath a ceiling and exposed to a localized fire source was performed by using CFD model. The validity of steady state calculation has been verified by results of experiments. Concerning the heat flux, the difference between analytical results and experimental values increases with increasing dimensionless heat release rate Q*DII, '" Q/ pCPTog 112 DHB3/2 • In the case of the lower flange, the difference between the analytical result and experimental value increases rapidly over the range of Q*DHB from 0.35 to 0.5, reaching the maximum value of about 22 (kW/m²). This difference is equivalent to 56% of the maximum heat flux in the experiment. While the error for the heat flux scattered within 20% to 56% of the maximum heat flux measured in the experiment, the maximum error for the temperature remained 22%.