干旱区生态环境知识资源中心(Arid): RANS Simulation of Local Strong Sandstorms Induced by a Cold Pool with Vorticity

Arid

DOI	10.3390/atmos11040321
	RANS Simulation of Local Strong Sandstorms Induced by a Cold Pool with Vorticity
	He, Yuanping 1,2; Gu, Zhaolin 1,3; Shui, Qingxiang 1; Liu, Botao 4; Lu, Weizhen 5; Zhang, Renjian 6; Zhang, Daizhou 7; Yu, Chuck Wah 1,8
通讯作者	Gu, Zhaolin
来源期刊	ATMOSPHERE
EISSN	2073-4433
出版年	2020
卷号	11 期号:4
英文摘要	Local strong sandstorms (LSSs) in northwestern China often occur suddenly in tens of minutes during the late afternoon and by dusk. Observations and theoretical studies have shown the trigger role of cold-air pools over desert areas for the occurrence of LSS. In this study, a numerical heat convection model was established to simulate an LSS that was induced by a single cold pool with vertical helicity to study the evolution process. The Reynolds averaged Navier Stokes (RANS) method was used for the numerical calculation to illustrate different stages of the evolution process of an LSS. Results show that after the intrusion of a cold pool into the upper region of the surface convective mixing layer, descending of the cold air would lead to the downward transport of vorticity, enabling thermal convection cells in the mixing layer to become swirling convection cells. After LSS is fully developed, there occurs many subvortices (secondary vortices) in the convection field. The velocity at different altitudes over selected positions in the calculation domain is consistent with the lobe shape of an LSS. The secondary vortices cause quick and huge energy dissipation and the decay of the LSS. These results are consistent with observations and indicate the crucial effect of convection cells structure in the mixing layer and the cold pool in the upper layer on the formation of LSS.
英文关键词	sandstorms local strong sandstorm (LSS) cold pool thermal convection cells RANS lobes shape
类型	Article
语种	英语
国家	Peoples R China ; Japan ; England
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000539492200008
WOS关键词	NUMERICAL-SIMULATION ; DUST STORMS ; BOUNDARY ; FLOW ; HEAD
WOS类目	Environmental Sciences ; Meteorology & Atmospheric Sciences
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
来源机构	中国科学院大气物理研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/319421
作者单位	1.Xi An Jiao Tong Univ, Dept Earth & Environm Sci, Xian 710049, Peoples R China; 2.Sun Yat Sen Univ, Sch Atmospher Sci, Guangzhou 510275, Peoples R China; 3.Cent Asia Res Ctr Atmospher Sci, Urumqi 830002, Peoples R China; 4.Wuhan Univ, Inst Technol Sci, Wuhan 430072, Peoples R China; 5.City Univ Hong Kong, Dept Architecture & Civil Engn, Kowloon Tong, Hong Kong 999077, Peoples R China; 6.Chinese Acad Sci, Inst Atmospher Phys, Beijing 10029, Peoples R China; 7.Prefectural Univ Kumamoto, Fac Environm & Symbiot Sci, Kumamoto 8628502, Japan; 8.Int Soc Built Environm ISBE, Milton Keynes MK7 8HQ, Bucks, England
推荐引用方式 GB/T 7714	He, Yuanping,Gu, Zhaolin,Shui, Qingxiang,et al. RANS Simulation of Local Strong Sandstorms Induced by a Cold Pool with Vorticity[J]. 中国科学院大气物理研究所,2020,11(4).
APA	He, Yuanping.,Gu, Zhaolin.,Shui, Qingxiang.,Liu, Botao.,Lu, Weizhen.,...&Yu, Chuck Wah.(2020).RANS Simulation of Local Strong Sandstorms Induced by a Cold Pool with Vorticity.ATMOSPHERE,11(4).
MLA	He, Yuanping,et al."RANS Simulation of Local Strong Sandstorms Induced by a Cold Pool with Vorticity".ATMOSPHERE 11.4(2020).