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

Authors: D. Delaunay, J.P. Flori, C. Sacre

Addresses: Centre Scientifique et Technique du Batiment, Aerodynamic and Climatic Environment Department, 11 rue Henri Picherit, BP 82341, 44323 Nantes Cedex 3, France. ' Centre Scientifique et Technique du Batiment, Aerodynamic and Climatic Environment Department, 11 rue Henri Picherit, BP 82341, 44323 Nantes Cedex 3, France. ' Centre Scientifique et Technique du Batiment, Aerodynamic and Climatic Environment Department, 11 rue Henri Picherit, BP 82341, 44323 Nantes Cedex 3, France

Abstract: 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.

DOI: 10.1504/IJEP.1997.028221

International Journal of Environment and Pollution, 1997 Vol.8 No.3/4/5/6, pp.690 - 698

Available online: 15 Sep 2009 *

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