Description
In this paper the pressure drop across the tunnel is estimated when a fire is developed inside a tunnel. The pressure drop is obtained for ventilation flow speed of 3−4m/s in the upstream of the fire. Role of buoyancy driven turbulence is analysed along the tunnel. A simple one-dimensional solution for pressure calculation is developed and compared with full three-dimensional models. RANS simulation is used to estimate the mesh resolution and timestep size required while using DES. The DES solution is used to analyse the diagnostics of flow around the. It further confirms the throttling effect due to fire.
