干旱区生态环境知识资源中心(Arid): Large Eddy Simulation of Particle Transport and Deposition Over Multiple 2D Square Obstacles in a Turbulent Boundary Layer

Arid

DOI	10.1029/2020JD034461
	Large Eddy Simulation of Particle Transport and Deposition Over Multiple 2D Square Obstacles in a Turbulent Boundary Layer
	Le Ribault, C.; Vinkovic, I; Simoens, S.
通讯作者	Le Ribault, C (corresponding author), Univ Claude Bernard Lyon 1, CNRS, INSA Lyon, Ecole Cent Lyon,LMFA UMR 5509, Ecully, France.
来源期刊	JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
ISSN	2169-897X
EISSN	2169-8996
出版年	2021
卷号	126 期号:16
英文摘要	Predicting solid particle transport in the lowest parts of the atmosphere is a major issue for man-made obstacles in semi-arid regions. Here, we investigate the effects on solid particle saltation, of square obstacles on the ground with different spacings. The aerodynamic field is determined by large eddy simulations coupled with an immersed boundary method for the obstacles. Solid particles are tracked by a Lagrangian approach. Take-off and rebound models are introduced for the interaction of particles with the wall. Without particles, fluid velocity profiles are first compared with experiments (Simoens et al., 2007, ) showing good agreement. Special focus is put on the recirculation zone that plays an important role in solid particle entrapment. Particle concentration fields are presented. Accumulation zones are studied regarding the different obstacle spacings as an extension of the aerodynamic scheme by Oke (1988, ) to solid particle transport. A deposition peak appears before the first obstacle. When the spacing between the two obstacles is large enough, some particles are trapped within the recirculation and a second deposition peak arises. The streamwise evolution of the horizontal saltation flux shows that the lowest flux downstream of the obstacles is obtained for the highest separation. The deposition rate or the streamwise saltation flux are estimated globally as a function of obstacle spacing. These results illustrate how the numerical tool developed here can be used for assessing air quality in terms of solid particle concentration.
英文关键词	large eddy simulation street canyon solid particles saltation boundary layer deposition
类型	Article
语种	英语
开放获取类型	Green Submitted
收录类别	SCI-E
WOS记录号	WOS:000688706700010
WOS关键词	NONHYDROSTATIC ATMOSPHERIC SIMULATION ; PREDICTION SYSTEM ARPS ; SOLID PARTICLES ; SCALAR DISPERSION ; VARIABLE WIDTH ; STREET CANYON ; MODEL ; FLOW ; EROSION ; SALTATION
WOS类目	Meteorology & Atmospheric Sciences
WOS研究方向	Meteorology & Atmospheric Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/363888
作者单位	[Le Ribault, C.; Vinkovic, I; Simoens, S.] Univ Claude Bernard Lyon 1, CNRS, INSA Lyon, Ecole Cent Lyon,LMFA UMR 5509, Ecully, France
推荐引用方式 GB/T 7714	Le Ribault, C.,Vinkovic, I,Simoens, S.. Large Eddy Simulation of Particle Transport and Deposition Over Multiple 2D Square Obstacles in a Turbulent Boundary Layer[J],2021,126(16).
APA	Le Ribault, C.,Vinkovic, I,&Simoens, S..(2021).Large Eddy Simulation of Particle Transport and Deposition Over Multiple 2D Square Obstacles in a Turbulent Boundary Layer.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,126(16).
MLA	Le Ribault, C.,et al."Large Eddy Simulation of Particle Transport and Deposition Over Multiple 2D Square Obstacles in a Turbulent Boundary Layer".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 126.16(2021).