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	Large-eddy simulation of reactive pollutant dispersion over street canyons of different aspect ratios
	Du, T.Z.; Liu, Chun-Ho; Zhao, Y.B.
	2014
会议名称	ASME 2014 4th Joint US-European Fluids Engineering Division Summer Meeting, FEDSM 2014
会议地点	Chicago, Illinois, USA
英文摘要	In urban areas, pollutants are emitted from vehicles then disperse from the ground level to the downstream urban canopy layer (UCL) under the effect of the prevailing wind. For a hypothetical urban area in the form of idealized street canyons, the building-height-to-street-width (aspect) ratio (AR) changes the ground roughness which in turn leads to different turbulent airflow features. Turbulence is considered an important factor for the removal of reactive pollutants by means of dispersion/dilution and chemical reactions. Three values of aspect ratio, covering most flow scenarios of urban street canyons, are employed in this study. The pollutant dispersion and reaction are calculated using largeeddy simulation (LES) with chemical reactions. Turbulence timescale and reaction timescale at every single point of the UCL domain are calculated to examine the pollutant removal. The characteristic mechanism of reactive pollutant dispersion over street canyons will be reported in the conference.(6 refs)
收录类别	EI
语种	英语
内容类型	会议论文
源URL	[http://ir.siat.ac.cn:8080/handle/172644/6044]
专题	深圳先进技术研究院_数字所
作者单位	2014
推荐引用方式 GB/T 7714	Du, T.Z.,Liu, Chun-Ho,Zhao, Y.B.. Large-eddy simulation of reactive pollutant dispersion over street canyons of different aspect ratios[C]. 见:ASME 2014 4th Joint US-European Fluids Engineering Division Summer Meeting, FEDSM 2014. Chicago, Illinois, USA.

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