<p>This paper develops a novel modelling approach for ventilation flow in tunnels at ambient conditions (i.e. cold flow). The complexity of full CFD models of flow in tunnels or the inaccuracies of simplistic assumptions are avoided by efficiently combining ...

<p>Resalat Tunnel is one of the widest twin-tube traffic tunnels of its kind, located in the heart of Tehran. Traffic volume passing through this tunnel is so that congestion exists in most hours of the days, particularly in rush hours time. Therefore the ...

<p>To investigate traffic tunnel ventilation flows, a scaled model of a traffic tunnel with longitudinal ventilation system based on ducted fans is used. Flows in tunnels are influenced by tunnel geometry, fan characteristics, ventilation operation scenario, ...