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Studies on smoke movement in a tilted tunnel fire with longitudinal ventilation will be reported in this paper. Analytical equations on fires acting at the smoke layer were studied first. Numerical simulations with Computational Fluid Dynamics (CFD) were carried out. Physical scale modeling experiments were performed to study the critical velocity for preventing back-layering in a tunnel model with...
The object of this study is to investigate the human evacuation behavior and smoke behavior of a fire in an underground emporium. A practical survey about the occupants characteristics of number, age and gender was carried out. Then, different fire locations and occupants load in the fourth fire protection zone of the underground emporium were conducted numerically by using a CFD model FDS+Evac. And...
Smoke movement during fire in a large teaching building without sprinkler was simulated by large eddy simulation (LES) model. Several fire scenarios were considered to show the smoke movement in vertical and horizontal direction. It is found that the lower storey the fire location is, the more dangerous the people inside are for a multi-storey building. Also we can find when the smoke spreads along...
Numerical simulations of a clean room were conducted by software FDS5.3 using large-eddy simulation (LES). A computational fluid dynamics (CFD) model was first verified by comparing computational results with results of reduced scale clean room fire tests. The temperature near the ceiling round the fire location with three sizes acetone liquid fire were then studied for a typical full-scale clean...
To interpret the characteristics of smoke flow in a road tunnel with roof openings, numerical simulations were conducted by using CFD software FDS4.07 version. Also the predicted results were compared with the experimental data of a full scale experiment in a literature. With aiming at the engineering application, the software FDS can provide reliable predictions. Then various velocities varying from...
Many computer fire models were developed in the literature with the rapid advancement of information technology. With the possibility of implementing engineering performance-based fire codes, fire models are used frequently in hazard assessment. Among the different approaches, fire field models using the technique of computational fluid dynamics (CFD) are widely used. The approach takes the advantage...
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