Abstract
The importance of simulation of tunnel ventilation in an emergency condition is increasing. To take countermeasures against that situation, we developed an internet-based ventilation simulator for safe tunnel design. This simulator can calculate wind velocity and smoke concentration in a road tunnel with arbitrary size. It can simulate jet fan ventilation system and transverse ventilation system. It calculates unsteady condition so that transitional situations such as fire can be simulated. Users can choose tunnel size parameters, traffic conditions, ventilation systems, and other calculation parameters, through web interfaces. Results of simulations are also provided to users through the internet as raw data and visualized images.
