ArticleEnvironmental science and pollution research international2019
Buoyant wind-driven pollutant dispersion and recirculation behaviour in wedge-shaped roof urban street canyons.
Article in Environmental science and pollution research international, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.
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Who cites it
6 citing papers in PubMed.
- Investigation of the Wind-Direction Effect on Buoyancy-Driven Fire Smoke Dispersion in an Urban Street Canyon.International journal of environmental research and public health · 2023Article
- Numerical Simulation of the Smoke Recirculation Behavior in Street Canyons with Different Aspect Ratios and Cross-Wind Conditions.International journal of environmental research and public health · 2022Article
- Weather forecasting based on data-driven and physics-informed reservoir computing models.Environmental science and pollution research international · 2022Article
- Assessment of different ventilation strategies on ventilation performance in immersed tunnels.Environmental science and pollution research international · 2021Article
- Effect of triangular roof angle on dispersion of gaseous pollutants and particulate matter.Environmental science and pollution research international · 2021Article
- Numerical study of critical re-entrainment velocity of fire smoke within the street canyons with different building height ratios.Environmental science and pollution research international · 2019Article
Corrections and comments
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Authors and funding
6 authors.
Funding
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Abstract
The present study investigated the buoyant wind-driven pollutant plume dispersion and recirculation behaviour inside urban street canyons formed by buildings with wedge-shaped roofs. Numerical modelling was performed using a computational fluid dynamics (CFD) large eddy simulation (LES). Street canyon models with a strongly buoyant fire source located on the street and environmental winds perpendicular to the canyon were developed using the fire dynamics simulator (FDS). The complex interaction of buoyancy and wind, as well as their combined effects on the pollutant plume dispersion, was simulated inside the urban street canyon. The results showed that the flow pattern of pollutant plume dispersion inside the street canyon with increasing wind speed for different roof inclination angles could be divided into three regimes, including a recirculation regime, a quasi-recirculation regime and a non-recirculation regime. The pollutant levels in the street canyon, as indexed by carbon monoxide (CO) concentration, increased under the recirculation regime. For the quasi-recirculation regime, however, the leeward buildings primarily suffered from the higher pollutant levels. The critical wind speed needed to trigger recirculation was analysed for various roof inclination angles. A correlation was proposed to predict the critical wind speed of various wedge-shaped roof angles for recirculation regime and quasi-recirculation regimes.
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Registered trials
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