NDLI: Transport characteristics of PM$_{2.5}$ inside urban street canyons: The effects of trees and vehicles

Content Provider	Springer Nature Link
Author	Jin, Xinming Yang, Lijun Du, Xiaoze Yang, Yongping
Copyright Year	2016
Abstract	Particles emitted from vehicles can threaten human health. Therefore the investigations about the particle dispersion characteristics inside the street canyon are of significance. For the current work, the airflow fields and the particle movement inside an isolated street canyon with three aspect ratios under perpendicular wind direction and two typical wind speeds are studied numerically, for which the particle distributions are obtained by solving the drift-flux model. The conclusions demonstrate that the trees will result in the particles gathering. However, the particle deposition fluxes on the trees are so small which cannot effectively remove the particles from the ambient air. Besides, the vehicles tend to cluster particles around the street axis and slow down the dispersion to the curbside buildings. Therefore, the vehicles should not be ignored in the numerical models, especially for the cases in the wind direction of 90°. Moreover the cases with the aspect ratio of 0.5 are more sensitive to the effects of trees and vehicles. The shop vendors expose to the highest particle concentrations in most of the scenarios.
Starting Page	337
Ending Page	350
Page Count	14
File Format	PDF
ISSN	19963599
Journal	Building Simulation
Volume Number	10
Issue Number	3
e-ISSN	19968744
Language	English
Publisher	Tsinghua University Press
Publisher Date	2016-09-28
Publisher Place	Beijing
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	airflow pattern PM$_{2.5}$ street canyon trees and vehicles Building Construction and Design Engineering Thermodynamics, Heat and Mass Transfer Atmospheric Protection/Air Quality Control/Air Pollution Monitoring/Environmental Analysis
Content Type	Text
Resource Type	Article
Subject	Building and Construction Energy

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