Some Tips on Numerical Modeling of Airflow and Fires in Road Tunnels

The efficiency of tunnels systems is often evaluated using numerical simulations. This concerns both to normal and emergency mode tunnel operation. Therefore the safety level users may depend on quality models being built. most studied areas cover researches natural forced airflows in fire development smoke spreading as well modeling fan Thus, many software packages implementing Computational Fluid Dynamics (CFD) are applied here. Despite available recognized reliable, problem arises because built should be validated at least partially with experimental data. There a shortage data from real due high costs organizational or formal difficulties. Some researchers use scaled experiments, but this leads problems connected scaling. paper presents application two widely used packages—Fire Simulator (FDS) ANSYS Fluent reproduce some scenarios operation ventilation system for mode. Most results were compared obtained by own full scale measurements literature. practical issues concerning FDS discussed well.