الفهرس 
IntroductionOnly 14 pages are availabe for public view
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Abstract
The present study is a numerical investigation of the thermal and environmental behavior in an industrial building exposed to fire The model designed for this study represents a 1/10 scale of a typical industrial building The model has a triangle polygon un-symmetric ceiling, and a rectangular base of dimensions 3.0 m x 1.0 m with a height of 1.0 m with one opening as an opening door dimensioned 0.3 m x 0.25m. The material used in the model is gypsum board. The heat release is obtained from a simulation of assuming circular burner of 0.11 m diameter that uses LPG fuel and a heat release rate of 2.45 kW kept constant throughout the study. Temperature distribution both vertically and horizontally were measured using measurements devices represent thermocouples available from the program input data. The behavior of CO2 and O2 were also monitored until reaching steady state at different horizontal and vertical locations along the model. The study investigated the behavior of the previous outputs while changing the burner location with three different locations.Measurements showed that the thermal state inside the industrial building reached a steady state after an interval of time lies between 11 to 14 minutes. However, much shorter times are required to reach constant carbon dioxide concentrations throughout. The steady state is defined as the time from ignition after which no change with time is monitored in the temperature distribution. Furthermore, measurements are taken to the amount of fresh air entrained into the model via the opening door and the amount of gas out of the opening as well. The results show that the smoke stratifies in the higher layer of the model and the temperature decreases as the distance from the fire source increase. Generally, the overall temperature level in the industrial building model was found to be high in the center case of the industrial building model, higher in the case where the burner is next to one of the walls, and highest in the corner- burner case. As expected, the qualitative trend of CO2 and O2 measurements matched with the results obtained for the temperature measurements. 11 Also, Transient measurements were obtained for the temperature distribution for thepoint in the industrial building which has the same axial location (r/H) for the three cases of fire source (corner, side and center). The first set of numerical results used to validate an experimental model that was used to test the three fire cases. The results were obtained for a triangle un-symmetric ceiling in the cases of corner, side and center burner locations at different levels. Comparison between numerical and experimental results showed satisfactory agreement. The second set of numerical results used to investigate the change of program output results of the three fire cases after changing the ceiling slope from un-symmetric ceiling to symmetric ceiling shape. Comparison results showed that the symmetry of the model shape is better in behavior than the un-symmetry of the shape