气候变化领域集成服务门户(CCPortal): Eulerian numerical modeling of contaminant transport in Lower Manhattan, New York City, from a point-source release under the dominant wind condition: Insights gained via LES

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DOI	10.1016/j.atmosenv.2021.118621
	Eulerian numerical modeling of contaminant transport in Lower Manhattan, New York City, from a point-source release under the dominant wind condition: Insights gained via LES
	Oaks W.R.; Flora K.; Khosronejad A.
发表日期	2021
ISSN	1352-2310
卷号	262
英文摘要	Released pollutants, biological agents, and poisonous chemicals in populated urban areas can spread via wind flow and affect the safety and welfare of those close to the source and downstream. Being able to predict the transport of airborne contaminants in such urban areas could help stakeholders to plan emergency responses. Airflow due to the wind in urban areas with closely packed buildings results in a highly turbulent flow field around buildings that results in the transport of contaminant plumes. We conduct high-resolution large-eddy simulation (LES) of airflow of the dominant wind in the south to north direction with a mean-flow velocity of 3.58 m/s in a portion of Manhattan, New York, which is 2.5 km long in the north-south direction, 1.8 km wide in the east-west direction, and 0.6 km high, located at its southern tip. The study area is a highly-populated area with densely packed buildings in Manhattan. The LES captures turbulent flow dynamics around the buildings, which vary in height from several stories to skyscrapers, and, consequently, the transport of contaminant plume propagating downstream from a source point, which is located on the east side of the New York Stock Exchange building at 30 m above ground. The airflow tends to align with the streets that are reasonably parallel to the wind direction, creating high-velocity core regions. For as long as the source of contamination exists, the pollution plume rapidly travels through the streets, reaching downwind regions of the study area in about 20 min. Once the pollutant source is removed, the pollution plume propagates out of the study area. However, it takes about 40 min for the pollution to completely exit the study area due to the contaminants trapped in the low-momentum urban regions, such as open areas between tall buildings and narrow streets, which take longer to either exit the study area. © 2021 Elsevier Ltd
关键词	Contaminant transport Large-eddy simulation New York city Point-source pollutant Urban area
语种	英语
scopus关键词	Air; Contamination; Office buildings; Tall buildings; Turbulent flow; Urban transportation; Contaminant plume; Contaminants transport; Down-stream; Large-eddy simulations; Manhattans; New York city; Point-source pollutant; Pollution plumes; Study areas; Urban areas; Large eddy simulation; airflow; building; flow field; numerical model; pollutant source; pollutant transport; safety; turbulence; airflow; article; contamination; flow rate; New York; plume; pollutant; simulation; travel; turbulent flow; urban area; Kansas; Manhattan; New York [New York (STT)]; New York [United States]; United States
来源期刊	ATMOSPHERIC ENVIRONMENT
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/248300
作者单位	Civil Engineering Department, College of Science and Engineering, Stony Brook University, Stony BrookNY 11794, United States
推荐引用方式 GB/T 7714	Oaks W.R.,Flora K.,Khosronejad A.. Eulerian numerical modeling of contaminant transport in Lower Manhattan, New York City, from a point-source release under the dominant wind condition: Insights gained via LES[J],2021,262.
APA	Oaks W.R.,Flora K.,&Khosronejad A..(2021).Eulerian numerical modeling of contaminant transport in Lower Manhattan, New York City, from a point-source release under the dominant wind condition: Insights gained via LES.ATMOSPHERIC ENVIRONMENT,262.
MLA	Oaks W.R.,et al."Eulerian numerical modeling of contaminant transport in Lower Manhattan, New York City, from a point-source release under the dominant wind condition: Insights gained via LES".ATMOSPHERIC ENVIRONMENT 262(2021).