A FAST MODEL FOR FLOW AND POLLUTANT DISPERSION AT THE NEIGHBOURHOOD SCALE
Item
Title (Dublin Core)
eng
A FAST MODEL FOR FLOW AND POLLUTANT DISPERSION AT THE NEIGHBOURHOOD SCALE
Description (Dublin Core)
eng
This paper deals with the development of a simple urban model for flow and dispersion in the urban canopy layer (UCL).
The flow module of the model calculates spatially-averaged wind profiles adopting a technique recently proposed in the literature,
which is based on a balance equation between the obstacle drag force and the local shear stress. Spatially-averaged wind profiles are
used as input for a newly proposed dispersion model which solves the advection-diffusion equation at neighbourhood scale. In the
model, the effects of the buildings within the UCL are taken into account by means of morphological parameters λf and λp (the
ratios of plan area and frontal area of buildings to the lot area).
Spatially-averaged mean concentrations output by the developed model are compared with numerical results obtained from the
computational fluid dynamics (CFD) model FLUENT. In particular, two configurations of constant height UCL have been considered, which refer to as λp = λf = 0.16 and λp = λf = 0.44. The originality of the study is that the dispersion model itself integrates the equations without explicitly resolving the flow around individual buildings but still accounts for their effects. The computational costs are much reduced which makes it suitable for the predictions of concentrations over the neighbourhood scale in an operational context.
The flow module of the model calculates spatially-averaged wind profiles adopting a technique recently proposed in the literature,
which is based on a balance equation between the obstacle drag force and the local shear stress. Spatially-averaged wind profiles are
used as input for a newly proposed dispersion model which solves the advection-diffusion equation at neighbourhood scale. In the
model, the effects of the buildings within the UCL are taken into account by means of morphological parameters λf and λp (the
ratios of plan area and frontal area of buildings to the lot area).
Spatially-averaged mean concentrations output by the developed model are compared with numerical results obtained from the
computational fluid dynamics (CFD) model FLUENT. In particular, two configurations of constant height UCL have been considered, which refer to as λp = λf = 0.16 and λp = λf = 0.44. The originality of the study is that the dispersion model itself integrates the equations without explicitly resolving the flow around individual buildings but still accounts for their effects. The computational costs are much reduced which makes it suitable for the predictions of concentrations over the neighbourhood scale in an operational context.
Creator (Dublin Core)
Di Sabatino, S.
Buccolieri, R.
Paradisi, P.
Palatella, L.
Corrado, R.
Solazzo, E.
Subject (Dublin Core)
eng
pollutant dispersion;urban canopy;morphological parameters; spatially-averaged wind profiles;neighbourhood scale
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/64340
eng
https://hrcak.srce.hr/file/96468
Source (Dublin Core)
Hrvatski meteorološki časopis
ISSN 1330-0083 (Print)
ISSN 1849-0700 (Online)
Volume 43
Issue 43/2
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.