A benchmark for numerical scheme validation of airborne particle exposure in street canyons

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• 作者：S. Marini (1)
  G. Buonanno (1) (2)
  L. Stabile (1)
  P. Avino (3)
  
  1. Department of Civil and Mechanical Engineering ; University of Cassino and Southern Lazio ; via Di Biasio 43 ; 03043 ; Cassino ; Italy
  2. Queensland University of Technology ; Brisbane ; Australia
  3. D.I.P.I.A. ; INAIL Settore Ricerca ; via Urbana 167 ; 00184 ; Rome ; Italy
  
• 关键词：Street canyon ; Ultrafine particles ; Numerical scheme validation ; Urban area ; Particle monitoring
• 刊名：Environmental Science and Pollution Research
• 出版年：2015
• 出版时间：February 2015
• 年：2015
• 卷：22
• 期：3
• 页码：2051-2063
• 全文大小：1,522 KB
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• 刊物类别：Earth and Environmental Science
• 刊物主题：Environment
  Environment
  Atmospheric Protection, Air Quality Control and Air Pollution
  Waste Water Technology, Water Pollution Control, Water Management and Aquatic Pollution
  Industrial Pollution Prevention
  
• 出版者：Springer Berlin / Heidelberg
• ISSN：1614-7499

文摘

Measurements of particle concentrations and distributions in terms of number, surface area, and mass were performed simultaneously at eight sampling points within a symmetric street canyon of an Italian city. The aim was to obtain a useful benchmark for validation of wind tunnel experiments and numerical schemes: to this purpose, the influence of wind directions and speeds was considered. Particle number concentrations (PNCs) were higher on the leeward side than the windward side of the street canyon due to the wind vortex effect. Different vertical PNC profiles were observed between the two canyon sides depending on the wind direction and speed at roof level. A decrease in particle concentrations was observed with increasing rooftop wind speed, except for the coarse fraction indicating a possible particle resuspension due to the traffic and wind motion. This study confirms that particle concentration fields in urban street canyons are strongly influenced by traffic emissions and meteorological parameters, especially wind direction and speed.