气候变化领域集成服务门户(CCPortal): Modelling chemistry and transport in urban street canyons: Comparing offline multi-box models with large-eddy simulation

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DOI	10.1016/j.atmosenv.2021.118709
	Modelling chemistry and transport in urban street canyons: Comparing offline multi-box models with large-eddy simulation
	Dai Y.; Cai X.; Zhong J.; MacKenzie A.R.
发表日期	2021
ISSN	1352-2310
卷号	264
英文摘要	Computational fluid dynamics models are resource-intensive, particularly when complex chemical schemes are implemented, and this computational expense limits their use in sensitivity analyses. We propose a flexible multi-box model that permits spatial disaggregation of sources and depositions to simulate the transportation and distribution of chemical species in street canyons with any aspect ratios for which a large eddy simulation (LES) of the flow exists. The spatial patterns of reactive species in the multi-box simulations are in good agreement with those from the LES, especially for the deep canyon from which air escapes more slowly. The overestimation of the LES simulation worsens somewhat due to segregations when the chemistry of volatile organic compounds (VOCs) is included but the overall pattern is captured in a modelling framework. By reducing computational costs by several orders of magnitude, the multi-box model allows more sensitivity testing than the LES, and is an effective approach to investigate spatial pattern of fast non-linear chemistry or microphysics at the street scale. © 2021
关键词	Air quality Box models Nitrogen dioxide Ozone Street canyon Urban air pollution
语种	英语
scopus关键词	Aspect ratio; Chemical analysis; Computational chemistry; Computational fluid dynamics; Large eddy simulation; Nitrogen oxides; Sensitivity analysis; Urban transportation; Volatile organic compounds; Box models; Computational fluid dynamics modeling; Large-eddy simulations; Model chemistry; Modeling transport; Offline; Spatial patterns; Street canyon; Urban air pollution; Urban street canyon; Air quality; comparative study; cost analysis; large eddy simulation; numerical model; street canyon; transportation; volatile organic compound; Trachinotus falcatus
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/248224
作者单位	School of Geography, Earth & Environmental Sciences, University of Birmingham, Edgbaston, Birmingham, B15 2TT, United Kingdom
推荐引用方式 GB/T 7714	Dai Y.,Cai X.,Zhong J.,et al. Modelling chemistry and transport in urban street canyons: Comparing offline multi-box models with large-eddy simulation[J],2021,264.
APA	Dai Y.,Cai X.,Zhong J.,&MacKenzie A.R..(2021).Modelling chemistry and transport in urban street canyons: Comparing offline multi-box models with large-eddy simulation.ATMOSPHERIC ENVIRONMENT,264.
MLA	Dai Y.,et al."Modelling chemistry and transport in urban street canyons: Comparing offline multi-box models with large-eddy simulation".ATMOSPHERIC ENVIRONMENT 264(2021).