气候变化领域集成服务门户(CCPortal): Detailed magnetic resonance imaging measurements of a contaminant dispersed in an Oklahoma City model

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DOI	10.1016/j.atmosenv.2019.117129
	Detailed magnetic resonance imaging measurements of a contaminant dispersed in an Oklahoma City model
	Benson M.; Wilde N.; Brown A.; Elkins C.
发表日期	2020
ISSN	13522310
卷号	222
英文摘要	Magnetic resonance imaging techniques were used to collect time-averaged three-component velocity and concentration data across a scaled model of 2003 Oklahoma City. The experiments included the release of a passive scalar designed to mimic the field tests of the Joint Urban 2003 (JU03) study conducted at the same site and provide measurements throughout the entire three-dimensional domain in nearly 10 million locations. The flow was in a fully turbulent water channel with a Reynolds number of 36,000 based on the channel hydraulic diameter. The geometrically similar cityscape was on the bottom wall of the channel. A low-momentum injector was designed to release the contaminant at the intersection of Broadway and Main street – a location that closely matches the Intense Observation Period 8 of JU03, which has been previously examined in several studies. Magnetic Resonance Velocimetry (MRV) and Magnetic Resonance Concentration (MRC) techniques measured the time averaged field with experimental uncertainties of 5.5% and 4% respectively, providing a candidate validation data set for atmospheric flow models. The inflow velocity boundary condition was measured at the inlet plane of the test section. Detailed analysis is provided of the flow field and concentration distribution, focusing on major features in the downtown area. In addition, a comparison with the available field test data near surface locations is conducted. The measurements are believed to be amongst the first of their kind and suggest that MRV/MRC techniques may be an effective means to study the flow and scalar dispersion within urban environments. © 2019
英文关键词	Contaminant dispersion; JU03; MRC; MRV; Oklahoma city
学科领域	Location; Magnetic resonance imaging; Magnetism; Resonance; Reynolds number; Turbulent flow; Urban growth; Concentration data; Concentration distributions; Contaminant dispersion; Experimental uncertainty; JU03; Oklahoma city; Three-dimensional domain; Urban environments; Atmospheric movements; atmospheric pollution; boundary condition; concentration (composition); dispersion; experimental study; imaging method; measurement method; air pollutant; airflow; atmospheric dispersion; canopy; comparative study; concentration (parameter); controlled study; model; nuclear magnetic resonance imaging; Oklahoma; priority journal; urban area; Oklahoma
语种	英语
scopus关键词	Location; Magnetic resonance imaging; Magnetism; Resonance; Reynolds number; Turbulent flow; Urban growth; Concentration data; Concentration distributions; Contaminant dispersion; Experimental uncertainty; JU03; Oklahoma city; Three-dimensional domain; Urban environments; Atmospheric movements; atmospheric pollution; boundary condition; concentration (composition); dispersion; experimental study; imaging method; measurement method; air pollutant; airflow; atmospheric dispersion; canopy; comparative study; concentration (parameter); controlled study; model; nuclear magnetic resonance imaging; Oklahoma; priority journal; urban area; Oklahoma
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/120839
作者单位	Department of Civil and Mechanical Engineering, United States Military Academy, West Point, NY, United States; Department of Aeronautics and Astronautics, Massachusetts Institute of Technology, Cambridge, MA, United States; Fire Science and Technology Department, Sandia National Labs, Albuquerque, NM, United States; Department of Mechanical Engineering, Stanford University, Palo Alto, CA, United States
推荐引用方式 GB/T 7714	Benson M.,Wilde N.,Brown A.,et al. Detailed magnetic resonance imaging measurements of a contaminant dispersed in an Oklahoma City model[J],2020,222.
APA	Benson M.,Wilde N.,Brown A.,&Elkins C..(2020).Detailed magnetic resonance imaging measurements of a contaminant dispersed in an Oklahoma City model.Atmospheric Environment,222.
MLA	Benson M.,et al."Detailed magnetic resonance imaging measurements of a contaminant dispersed in an Oklahoma City model".Atmospheric Environment 222(2020).