Τίτλος:
On the wind flow patterns under neutral and unstable conditions in an urban area
Γλώσσες Τεκμηρίου:
Αγγλικά
Περίληψη:
Wind flow and pollutant dispersion within urban areas depend on the approaching flow profile and temperature stratification. Thus, the flow field developed under neutral and unstable stratification conditions, within a street-canyon, was studied experimentally and numerically for a two-dimensional urban background set-up. Wind-tunnel measurements were carried out with a triple hot sensor anemometer, while an academically developed CFD κ-ε algorithm was applied, employing an unstructured Cartesian grid. The numerical code compared well with experimental results. Under unstable conditions, intensive mixing exists within the street-canyons and the buoyancy-induced flow affects the vertical air motions within and above them. Copyright © 2011 Inderscience Enterprises Ltd.
Συγγραφείς:
Nezis, A.A.
Angelidis, D.I.
Assimakopoulos, V.D.
Bergeles, G.C.
Περιοδικό:
International Journal of Environment and Pollution
Εκδότης:
Inderscience Publishers
Λέξεις-κλειδιά:
Computational fluid dynamics; Thermal stratification; Wind tunnels, Buoyancy induced flow; Cartesian grid; Pollutant dispersions; Temperature stratification; Unstable conditions; Urban street canyon; Wind tunnel measurements; Wind-flow pattern, Atmospheric movements, air temperature; airflow; algorithm; anemometer; atmospheric pollution; buoyancy forcing; computational fluid dynamics; street canyon; two-dimensional modeling; urban atmosphere; wind tunnel, air pollutant; airflow; anemometer; article; mathematical analysis; urban area; wind
DOI:
10.1504/IJEP.2011.047340
