a computational fluid dynamic (cfd) simulation of pm10 dispersion caused by rail transit construction activity: a real urban street canyon model

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ID: 233416
2018
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Abstract
Particle emissions derived from construction activities have a significant impact on the local air quality, while the canyon effect with reduced natural ventilation contributes to the highest particulate pollution in urban environments. This study attempted to examine the effect of PM10 emissions derived from the construction of a rail transit system in an urban street canyon. Using a 3D computational fluid dynamic (CFD) model based on a real street canyon with different height ratios, this study formulates the impact of height ratio and wind directions on the dispersion and concentration of PM10. The results indicate that parallel flow would cause the concentration of PM10 at the end of the street canyons in all height ratios, and the trends in horizontal, vertical and lateral planes in all street canyons are similar. While in the condition of perpendicular flow, double-eddy circulations occur and lead to the concentration of PM10 in the middle part of the street canyon and leeward of backwind buildings in all height ratios. Furthermore, perpendicular flow will cause the concentration of PM10 to increase if the upwind buildings are higher than the backwind ones. This study also shows that the dispersion of PM10 is strongly associated with wind direction in and the height ratios of the street canyons. Certain measures could, therefore, be taken to prevent the impact on people in terms of the PM10 concentration and the heights of street canyons identified in this research. Potential mitigation strategies are suggested, include measurements below 4 m according to governmental regulations, dust shields, and atomized water.
Reference Key
wang2018internationala Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors ;Yang Wang;Ying Zhou;Jian Zuo;Raufdeen Rameezdeen
Journal archives of biochemistry and biophysics
Year 2018
DOI
10.3390/ijerph15030482
URL
http://www.mdpi.com/1660-4601/15/3/482
Keywords
PM10 Chemical technology microrna bacillus subtilis inhibition virtual simulation nursing home electrical engineering interaction analytical chemistry minority ebola virus occupancy indoor air electronics wireless telephone industry nuclear engineeringcellular telephone services industry educationinformation technology

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