Fire and ventilation
IDA Tunnel can be used to study both hygienic and emergency fire ventilation situations.
Ventilation may be longitudinal or transversal, with air supply and exhaust terminal devices distributed along the tunnel. For momentum jet fans the user specifies cross-sectional area, efficiency and air velocity.
Tunnel fire scenarios can be simulated, in which case a user specified heatflux is added in a limited section of the tunnel. Models for smoke production depending on fire type and combustion materials are available as well as fire size limitations according to available oxygen. Temperature profile into the wall and smoke radiation is modelled.