The Modeling And Comparison Of Zone Model On Two-Compartment Fire In Buildings

The research of fire science is limited by the complication of combustion, the costliness of equipments for experiments and the measures. As the development of computer technology, the research of fire modeling is being paid attention to gradually nowadays.Firstly, this thesis discussed the current situation and some major theoretical approach on the current fire modeling study that is to say numerical simulation. Zone modeling is chosed ultimately combining with the task on the basis of advantages and disadvantages respectively of expert system, network model, zone model and field model. The investigation of building fire should begin with the law of fire development explored in the two-compartment, especially in the field of multi-compartment research. So CFAST widely applied to zone modeling is chosen as theoretics for the thesis.The model establishment of fire process is accomplished according to exploring the CFAST theoretics deeply with gaining the differential equations and mathematical physics equations which are going to solve, i. e. zone model theoretics is expressed with mathematical physics model equations. Fourth-order Runge-Kutta method is chosen as the numerical method for the thesis with comparing various ones because Ordinary Differential Equations should be solved in the thesis. Programmes are designed with the mathematical software Maple version 9 then solving different fire scenarios. Finally fire scenarios are simulated with CFAST comparing the results gained from both methods. The model research about building fire in two-compartment is authentic according to comparison. The aim in this thesis is to make the programmme have expansibility and provide the base for adding the improved fire model particularly the heat radiation model. Conclusions which are drawn from investigations above to some extent can serve as references for computational modeling research of fire science, which hence provide practical application for development of indoor fire.