EVALUATION OF NUMERICAL FLOW AND DISPERSION SIMULATIONS FOR STREET CANYONS WITH AVENUE-LIKE TREE PLANTING BY COMPARISON WITH WIND TUNNEL DATA
Item
Title (Dublin Core)
eng
EVALUATION OF NUMERICAL FLOW AND DISPERSION SIMULATIONS FOR STREET CANYONS WITH AVENUE-LIKE TREE PLANTING BY COMPARISON WITH WIND TUNNEL DATA
Description (Dublin Core)
eng
Flow and traffic-originated pollutant dispersion in an urban street canyon with avenue-like tree planting have been
studied by means of wind tunnel and CFD investigations. The study comprises tree planting of different crown porosity, planted in
two rows within a canyon of street width to building height ratio W/H = 2 and street length to building height ratio L/H = 10
exposed to a perpendicular approaching boundary layer flow. Numerical simulations have been performed with the commercial
CFD code FLUENT™ by employing the RSM turbulence model. In the presence of tree planting, both measurements and
simulations show considerable larger pollutant concentrations in proximity of the leeward wall and slightly lower concentrations in
proximity of the windward wall in comparison to the tree-less street canyon. In particular, FLUENT slightly underestimated
pollutant concentrations in proximity of the leeward wall in all cases studied, while near the windward wall there is no general
tendency towards underestimation or overestimation. Overall, numerical computations compare qualitatively well with experimental
data. Results from commonly used statistical tests also suggest the CFD predictions to be satisfactory. Results obtained in this work
by combining wind tunnel experiments and CFD based simulations in a novel aspect of research suggest ways to obtain quantitative
information for planning and implementation of exposure mitigation using trees in urban street canyons.
studied by means of wind tunnel and CFD investigations. The study comprises tree planting of different crown porosity, planted in
two rows within a canyon of street width to building height ratio W/H = 2 and street length to building height ratio L/H = 10
exposed to a perpendicular approaching boundary layer flow. Numerical simulations have been performed with the commercial
CFD code FLUENT™ by employing the RSM turbulence model. In the presence of tree planting, both measurements and
simulations show considerable larger pollutant concentrations in proximity of the leeward wall and slightly lower concentrations in
proximity of the windward wall in comparison to the tree-less street canyon. In particular, FLUENT slightly underestimated
pollutant concentrations in proximity of the leeward wall in all cases studied, while near the windward wall there is no general
tendency towards underestimation or overestimation. Overall, numerical computations compare qualitatively well with experimental
data. Results from commonly used statistical tests also suggest the CFD predictions to be satisfactory. Results obtained in this work
by combining wind tunnel experiments and CFD based simulations in a novel aspect of research suggest ways to obtain quantitative
information for planning and implementation of exposure mitigation using trees in urban street canyons.
Creator (Dublin Core)
Gromke, Christof
Buccolieri, Riccardo
Di Sabatino, Silvana
Ruck, Bodo
Subject (Dublin Core)
eng
street canyon;tree planting;pollutant dispersion;wind tunnel;CFD
Publisher (Dublin Core)
Croatian meteorological society
Date (Dublin Core)
2008
Type (Dublin Core)
text
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Format (Dublin Core)
application/pdf
Identifier (Dublin Core)
https://hrcak.srce.hr/64271
eng
https://hrcak.srce.hr/file/96388
Source (Dublin Core)
Hrvatski meteorološki časopis
ISSN 1330-0083 (Print)
ISSN 1849-0700 (Online)
Volume 43
Issue 43/1
Language (Dublin Core)
eng
Rights (Dublin Core)
info:eu-repo/semantics/openAccess
The papers of this Journal are free of charge for personal or educational use, with respect of copyright of authors and publisher.