In this paper the application of numerical and physical models for the simulation of airborne pollutants in urban areas are presented. The assessment of the impact of cruise ships during the hoteling phase in the port of Naples is considered as case study. A physical model of the urban area of Naples has been realized (scale 1:500) and tested in the wind tunnel facility of the Ecole Central de Lyon. Results of wind tunnel tests are compared with CALPUFF and CFD simulations with the aim to validate the performances of the models. The results obtained give useful information for an optimized use of dispersion models.
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