Numerical simulation of the effects of canopy properties on airflow and pollutant dispersion in street canyons

doi:10.1177/1420326X211005174

CORC > 地球环境研究所 > 中国科学院地球环境研究所 > 黄土与第四纪地质国家重点实验室（2010~）

	Numerical simulation of the effects of canopy properties on airflow and pollutant dispersion in street canyons
	Wang, Le 1,2; Tian, Wen-Xin 3; Zhao, Xiu-Yong 3; Huang, Chuan-Qing 4
刊名	INDOOR AND BUILT ENVIRONMENT
	2021-04-27
页码	13
关键词	Street canyon airflow field air velocity numerical simulation tree crowns tree canopy canopy porosity
ISSN号	1420-326X
DOI	10.1177/1420326X211005174
通讯作者	Huang, Chuan-Qing(huangcq@sust.edu.cn)
英文摘要	The air flow and pollutant concentration fields in a street canyon affected by trees could affect the comfort and health of residents. At present, the description of the non-uniform/discontinuous distribution of leaves is difficult. In this study, the leaf distribution in the canopy was characterized by establishing non-continuous (uniform/random) algorithm based on a numerical simulation method, and the effects of canopy properties including, height, porosity and uniform/random leaf distribution, on the airflow and pollutant concentration fields in urban street canyons were investigated. The position of the tree canopy was found to directly affect the airflow field form and the air velocity distribution in the street canyon at low inflows. The average air velocity in the street canyon could be reduced significantly when the top of the tree canopy is near the top of the street canyon. The air velocity and pollutant concentration in the street canyon would vary only slightly due to the canopy porosity. Due to the increasing canopy porosity, the air velocity would increase, and the pollutant concentration would be reduced. The leaves are non-continuous and uniformly distributed at constant porosity, which does not significantly change the velocity distribution and pollutant concentration in the street canyon.
资助项目	State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, CAS[SKLLQG2034] ; Key Laboratory of Ocean Energy Utilization and Energy Conservation (Dalian University of Technology), Ministry of Education[LOEC-202010]
WOS关键词	LARGE-EDDY SIMULATION ; WIND-TUNNEL ; AVENUE-TREES ; URBAN ; ENVIRONMENT ; QUALITY ; IMPACT
WOS研究方向	Construction & Building Technology ; Engineering ; Public, Environmental & Occupational Health
语种	英语
出版者	SAGE PUBLICATIONS LTD
WOS记录号	WOS:000651167900001
资助机构	State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, CAS ; Key Laboratory of Ocean Energy Utilization and Energy Conservation (Dalian University of Technology), Ministry of Education
内容类型	期刊论文
源URL	[http://ir.ieecas.cn/handle/361006/16436]
专题	地球环境研究所_黄土与第四纪地质国家重点实验室（2010~）
通讯作者	Huang, Chuan-Qing
作者单位	1.Xian Shiyou Univ, Mech Engn Coll, Xian, Peoples R China 2.Chinese Acad Sci, State Key Lab Loess & Quaternary Geol, Inst Earth Environm, Xian, Peoples R China 3.State Environm Protect Key Lab Atmospher Phys Mod, Nanjing, Peoples R China 4.Shaanxi Univ Sci & Technol, Coll Chem & Chem Engn, Xian 710021, Peoples R China
推荐引用方式 GB/T 7714	Wang, Le,Tian, Wen-Xin,Zhao, Xiu-Yong,et al. Numerical simulation of the effects of canopy properties on airflow and pollutant dispersion in street canyons[J]. INDOOR AND BUILT ENVIRONMENT,2021:13.
APA	Wang, Le,Tian, Wen-Xin,Zhao, Xiu-Yong,&Huang, Chuan-Qing.(2021).Numerical simulation of the effects of canopy properties on airflow and pollutant dispersion in street canyons.INDOOR AND BUILT ENVIRONMENT,13.
MLA	Wang, Le,et al."Numerical simulation of the effects of canopy properties on airflow and pollutant dispersion in street canyons".INDOOR AND BUILT ENVIRONMENT (2021):13.