Abstract
The current paper describes the investigation of parameters related to accidents in tunnels in the framework of the Advanced Training System for Emergency Management project, A-TEAM. On this basis, the flow field is investigated within tunnels, and its effects on fire development and smoke concentration fields for these emergency cases are reconstructed. This is achieved with the use of the Computational Fluids Dynamics (CFD) model CFX-5. This model has been applied for two tunnels in Switzerland: Belchen, a one-directional road tunnel, and Grauhotz, a bi-directional railway tunnel. The simulations identify the effects of the direction of trains/traffic on the resulting concentration fields, and show that at low ventilation areas, accident releases lead to increased concentration levels.
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