摘要
The importance of radiative heat transfer in the simulation of indoor-fire has been studied.Computer codes have been developed based on four-flux model and discrete transfer model,respectively.Evaluation of the codes against exact analytic solution and experimental data shows that the discrete transfer model gives numerical results with acceptable accuracy while the four-flux model underpredicts the heat fluxes although the gen- eral trend is reasonable.Numerical studies have been performed of two-dimensional,axisymmetric turbulent, buoyancy-controlled indoor fire.The computational results show that neglecting radiation in the simulation can cause overprediction of 500K in the maximum temperature and less uniform velocity field compared to the prediction by discrete transfer model.The four-flux method has been found to produce less uniform velocity and temperature values than discrete transfer model,but is more economic in computation.
基金
Sponsored by the National Natural Science Foundation of China
