气候变化领域集成服务门户(CCPortal): Dispersion in an array of buildings in stable and convective atmospheric conditions

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DOI	10.1016/j.atmosenv.2019.117100
	Dispersion in an array of buildings in stable and convective atmospheric conditions
	Marucci D.; Carpentieri M.
发表日期	2020
ISSN	1352-2310
卷号	222
英文摘要	Wind tunnel experiments were conducted to study the impact of atmospheric stratification on flow and dispersion within and over a regular array of rectangular buildings. Three stable and two convective incoming boundary layers were tested with a Richardson number ranging from −1.5 to 0.29. Dispersion measurements were carried using a fast response flame ionisation detector. The results show that the stratification effect on the plume width is significantly lower than the effect on the vertical profiles. Stable stratification did not affect the plume central axis inside the canopy, but in the unstable case the axis appeared to deviate from the neutral case direction. Above the canopy both stratification types caused an increase in the plume deflection angle compared to the neutral case. Measured mean concentrations in stable stratification were up to two times larger in the canopy compared to the neutral case, while in convective conditions they were to three times smaller. The proportionality between the vertical turbulent fluxes and the vertical mean concentration gradient was also confirmed in the stratified cases. The high-quality experimental data produced during this work may help developing new mathematical models and parametrisation for non-neutral stratified conditions, as well as validating existing and future numerical simulations. © 2019 Elsevier Ltd
关键词	Array of cuboids Convective boundary layer Dispersion Stable boundary layer Wind tunnel
语种	英语
scopus关键词	Boundary layer flow; Boundary layers; Dispersion (waves); Wind tunnels; Array of cuboids; Atmospheric conditions; Atmospheric stratification; Convective boundary layers; Dispersion measurements; Flame ionisation detector; New mathematical model; Stable boundary layer; Atmospheric movements; array; atmospheric convection; boundary layer; building; convective boundary layer; dispersion; experimental study; Richardson number; stratification; wind tunnel; article; boundary layer; canopy; computer simulation; flame ionization detection; plume
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/249474
作者单位	EnFlo, Department of Mechanical Engineering Sciences, University of Surrey, Guildford, Surrey GU2 7XH, United Kingdom
推荐引用方式 GB/T 7714	Marucci D.,Carpentieri M.. Dispersion in an array of buildings in stable and convective atmospheric conditions[J],2020,222.
APA	Marucci D.,&Carpentieri M..(2020).Dispersion in an array of buildings in stable and convective atmospheric conditions.ATMOSPHERIC ENVIRONMENT,222.
MLA	Marucci D.,et al."Dispersion in an array of buildings in stable and convective atmospheric conditions".ATMOSPHERIC ENVIRONMENT 222(2020).