Loading...
Please wait, while we are loading the content...
Similar Documents
Study of Heavy Gas Pollutants' Dispersion in Street Canyon Terrain
| Content Provider | MDPI |
|---|---|
| Author | Nie, Xiaoye Fan, Yuyan Gao, Hong Lin, Qiang |
| Copyright Year | 2021 |
| Description | This study focused on heavy gas dispersion under the terrain conditions of street canyons. The effects of street aspect ratio and height ratio were investigated, and the influence of environmental wind speed in the typical ideal street canyon terrain was explored. The results indicated that the surrounding flow field distributions in street terrains were dominated by higher buildings. In addition, when the building height was held constant, the flow field was affected by the joint influence of the two isolated buildings. The interception effect of the street canyon on upstream pollutants declined with the decrease in the street canyon’s aspect ratio. In addition, when the height ratios were different, a large quantity of upstream pollutants accumulated on the windward side of higher buildings. The relative concentration per unit area inside the canyon was affected by the air circulation inside and outside the canyon and the size of the dispersion space. The increase in the environmental wind speed promotes the entry of pollutants into the street while aggravating the overall dispersion of the pollutants. Therefore, the emergence of the most unsafe wind speeds caused most of the pollutants to gather in the street canyons. |
| Starting Page | 1754 |
| e-ISSN | 22279717 |
| DOI | 10.3390/pr9101754 |
| Journal | Processes |
| Issue Number | 10 |
| Volume Number | 9 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2021-09-30 |
| Access Restriction | Open |
| Subject Keyword | Processes Environmental Engineering Wind Tunnel Cfd Simulation Pollutant Dispersion Heavy Gas Safety |
| Content Type | Text |
| Resource Type | Article |
