http://www.cnr.it/ontology/cnr/individuo/prodotto/ID42248

Analysis of local scale tree-atmosphere interaction on polluttant concentration in idealized street canyons and application to a real urban junction (Articolo in rivista)

Type

Prodotto della ricerca (Classe)
Articolo in rivista (Classe)

Label

Analysis of local scale tree-atmosphere interaction on polluttant concentration in idealized street canyons and application to a real urban junction (Articolo in rivista) (literal)

Anno

2011-01-01T00:00:00+01:00 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi

10.1016/j.atmosenv.2010.12.058 (literal)

Alternative label

Buccolieri R., Salim M.S., Sandra Leo L., Di Sabatino S., Chan A., Ielpo P., De Gennaro G., Gromke C. (2011)
Analysis of local scale tree-atmosphere interaction on polluttant concentration in idealized street canyons and application to a real urban junction
in Atmospheric environment (1994)
(literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori

Buccolieri R., Salim M.S., Sandra Leo L., Di Sabatino S., Chan A., Ielpo P., De Gennaro G., Gromke C. (literal)

Pagina inizio

1702 (literal)

Pagina fine

1713 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume

45 (literal)

Rivista

Atmospheric environment (Rivista)

Note

ISI Web of Science (WOS) (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni

Dipartimento di Scienza dei Materiali, University of Salento Division of Environment, Faculty of Engineering, University of Nottingham Malaysia Campus Water Research Institute-National Research Council, Bari division Department of Chemistry, University of Bari WSL Institute for Snow and Avalanche Research SLF Institute for Hydromechanics, Karlsruhe Institute of Technology KIT (literal)

Titolo

Analysis of local scale tree-atmosphere interaction on polluttant concentration in idealized street canyons and application to a real urban junction (literal)

Abstract

This paper first discusses the aerodynamic effects of trees on local scale flow and pollutant concentration in idealized street canyon configurations by means of laboratory experiments and Computational Fluid Dynamics (CFD). These analyses are then used as a reference modelling study for the extension a the neighbourhood scale by investigating a real urban junction of a medium size city in southern Italy. A comparison with previous investigations shows that street-level concentrations crucially depend on the wind direction and street canyon aspect ratio W/H (with W and H the width and the height of buildings, respectively) rather than on tree crown porosity and stand density. It is usually assumed in the literature that larger concentrations are associated with perpendicular approaching wind. In this study, we demonstrate that while for tree-free street canyons under inclined wind directions the larger the aspect ratio the lower the street-level concentration, in presence of trees the expected reduction of street-level concentration with aspect ratio is less pronounced. Observations made for the idealized street canyons are re-interpreted in real case scenario focusing on the neighbourhood scale in proximity of a complex urban junction formed by street canyons of similar aspect ratios as those investigated in the laboratory. The aim is to show the combined influence of building morphology and vegetation on flow and dispersion and to assess the effect of vegetation on local concentration levels. To this aim, CFD simulations for two typical winter/spring days show that trees contribute to alter the local flow and act to trap pollutants. This preliminary study indicates that failing to account for the presence of vegetation, as typically practiced in most operational dispersion models, would result in non-negligible errors in the predictions. (literal)

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