The formation of snow streamers in the turbulent atmosphere boundary layer

doi:10.1016/j.aeolia.2016.09.002

	The formation of snow streamers in the turbulent atmosphere boundary layer
	Huang, N; Wang, ZS; Wang, ZS (reprint author), Lanzhou Univ, Minist Educ China, Key Lab Mech Disaster & Environm Western China, Lanzhou 730000, Peoples R China.
刊名	Aeolian Research
	2016-12
卷号	23 页码:1-10
关键词	Drifting snow Large Eddy Simulation (LES) Turbulent boundary layer Snow streamers
ISSN号	1875-9637
DOI	10.1016/j.aeolia.2016.09.002
文献子类	Article
英文摘要	The drifting snow in the turbulent atmosphere boundary layer is an important type of aeolian multiphase flow. Current theoretical and numerical studies of drifting snow mostly consider the flow field as steady wind velocity. Whereas, little is known about the effects of turbulent wind structures on saltating snow particles. In this paper, a 3-D drifting snow model based on Large Eddy Simulation is established, in which the trajectory of every snow grain is calculated and the coupling effect between wind field and snow particles is considered. The results indicate that the saltating snow particles are reorganized by the suction effect of high-speed rotating vortexes, which results in the local convergence of particle concentration, known as snow streamers. The turbulent wind leads to the spatial non-uniform of snow particles lifted by aerodynamic entrainment, but this does not affect the formation of snow streamers. Whereas the stochastic grain-bed interactions make a great contribution to the final shapes of snow streamers. Generally, snow streamers display a characteristic length about 0.5 m and a characteristic width of approximately 0.16 m, and their characteristic sizes are not sensitive to the wind speed. Compared to the typical sand streamer, snow streamer is slightly narrower and the occurrence of other complex streamer patterns is later than that of sand streamers due to the better follow performance of snow grains with air flow. (C) 2016 Elsevier B.V. All rights reserved.
学科主题	Physical Geography
出版地	OXFORD
资助项目	国家自然科学基金项目 ; 中央高校基本科研业务费专项资金
项目编号	State Key Program of National Natural Science Foundation of China [91325203] ; National Natural Science Foundation of China [41371034] ; Innovative Research Group of the National Natural Science Foundation of China [11421062] ; Fundamental Research Funds for the Central Universities [lzujbky-2015-237, 862166]
语种	英语
WOS记录号	WOS:000389159200001
资助机构	NSFC ; LZU
内容类型	期刊论文
源URL	[http://ir.lzu.edu.cn/handle/262010/189437]
专题	土木工程与力学学院_期刊论文
通讯作者	Wang, ZS (reprint author), Lanzhou Univ, Minist Educ China, Key Lab Mech Disaster & Environm Western China, Lanzhou 730000, Peoples R China.
推荐引用方式 GB/T 7714	Huang, N,Wang, ZS,Wang, ZS . The formation of snow streamers in the turbulent atmosphere boundary layer[J]. Aeolian Research,2016,23:1-10.
APA	Huang, N,Wang, ZS,&Wang, ZS .(2016).The formation of snow streamers in the turbulent atmosphere boundary layer.Aeolian Research,23,1-10.
MLA	Huang, N,et al."The formation of snow streamers in the turbulent atmosphere boundary layer".Aeolian Research 23(2016):1-10.