A CFD modelling study of reactive pollutant dispersion in an urban street canyon

This study numerically explores the diffusion rules of pollutants in an idealized urban street canyon where photochemical reactions are present in the neighbourhood. The airborne pollutants dispersion and reaction in street canyons are further investigated in this study. There is a relatively tense...

Full description

Saved in:
Bibliographic Details
Published in:IOP conference series. Earth and environmental science 2018-10, Vol.188 (1), p.12051
Main Authors: Liu, C W, Mei, S J, Zhao, F Y
Format: Article
Language:English
Subjects:
Air pollution
Chemical activity
Chemical reactions
Diffusion
Dispersion
Indoor air pollution
Mathematical models
Neighborhoods
Nitric oxide
Nitrogen dioxide
Nitrogen oxides
Photochemical reactions
Photochemical smog
Photochemicals
Pollutants
Pollution dispersion
Smog
Solar radiation
Street canyons
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:This study numerically explores the diffusion rules of pollutants in an idealized urban street canyon where photochemical reactions are present in the neighbourhood. The airborne pollutants dispersion and reaction in street canyons are further investigated in this study. There is a relatively tense traffic pollutants release in urban neighborhoods, including nitrogen oxides and hydrocarbons. Photochemical reaction occurs at strong solar radiation, forming photochemical smog and other environment issues. We selected typical O3 + NO→O2 + NO2 reactions. Effects of the pollutant source location on pollutant dispersion and reaction are also investigated. Numerical simulations were conducted on chemically activity reactive air nitrogen oxides in urban street canyons with W (street canyon wide)/H (building height) = 1. Provided three different locations from the line source street canyon bottom exhaust nitric oxide diffusion and react with ozone in the free stream. The chemical reaction has a significant impact on the concentration of pollutants in the valley volume.
ISSN:1755-1307
1755-1315
1755-1315
DOI:10.1088/1755-1315/188/1/012051