Inderscience Publishers

Numerical modelling of gas dispersion from road tunnels in urban environments: comparison with field experiment data

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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.

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

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