Keywords: atmospheric dispersion models, field data, numerical modelling, turbulence modelling, urban environment, air pollution, environmental pollution, road tunnels, France, CFD, computational fluid dynamics, drag forces
Numerical modelling of gas dispersion from road tunnels in urban environments: comparison with field experiment data
Numerical computations and field experiments of the dispersion of a tracer gas from a road tunnel in Paris are compared. The Reynolds-averaged Navier-Stokes equations, combined with the k-ε turbulence model of Chen and Kim, are solved using the finite-volume code PHOENICS. Results are shown to be sensitive to the turbulence modelling and to the parameterisation of turbulence and drag forces generated by traffic.