An integrated approach for the analysis and modeling of road tunnel ventilation. Part II: Numerical model and its calibration

The present work represents the second and final part of a twofold study aiming at definition validation an integrated methodology for analysis modeling road tunnel ventilation systems. A numerical approach is presented, based on Finite Volume integration 1D mechanical thermal energy conservation equations network ducts, representing system 11.6 km long Mont Blanc Tunnel. set distributed concentrated loss coefficients, dissipation by friction in each system, calibrated against rich experimental dataset, collected throughout dedicated situ tests presented first work. calibration model carried out means genetic optimization algorithms. Predictions flow field using parameters are remarkable agreement with data, overall RMS error ± 0.27 m/s, i.e. same order accuracy measurement probes. Further selection data recorded monitoring control brought forward, highlighting robustness potential general applicability proposed approach.