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- W2557576183 abstract "The dispersion of air pollutants in large metropolitan areas is related to the wind flow around the street canyons. Numerical studies have been carried out in order to ascertain what are the parameters that influence the wind flow and the pollutant dispersion in a street canyon. Some of these parameters are related to thermal effects which promote an upsurge of a strong buoyancy flow close to the heating surfaces, leading to a combined thermally and mechanically induced flow which affects the flow fields and the pollutant dispersion. In the present study a finite- volume commercial code (FLUENT) was used for the numerical simulation of the flow field. The modeling of the conservation equations is based on Reynolds Averaged Navier-Stokes (RANS) and uses the standard � k - turbulence model. For this study, it is considered the heating of building surfaces and street canyon bottom surface for different aspect ratios (building height per street width). An additional parameter was included, namely the temperature difference between the street canyon surfaces and the free-stream air. Another important parameter that was analyzed is the location of the pollution source, ranging from the centre of the street canyon to positions close to the leeward building, that is, the upwind side of the canyon, and the windward building, the downwind side of the canyon. The results provide important information about the influence of such parameters on pollutant dispersion." @default.
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- W2557576183 date "2009-01-01" @default.
- W2557576183 modified "2023-10-08" @default.
- W2557576183 title "COMPUTATIONAL ANALYSIS OF THE INFLUENCE OF THERMAL AND GEOMETRICAL PARAMETERS ON POLLUTANT DISPERSION IN STREET CANYON" @default.
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