干旱区生态环境知识资源中心(Arid): Discrete Element Simulation on Sand-Bed Collision Considering Surface Moisture Content

Arid

DOI	10.3390/pr10010052
	Discrete Element Simulation on Sand-Bed Collision Considering Surface Moisture Content
	Dun, Hongchao; Yue, Peng; Huang, Ning; Zhang, Jie
通讯作者	Zhang, J (corresponding author)，Lanzhou Univ, Key Lab Mech Disaster & Environm Western China, Lanzhou 730000, Peoples R China. ; Zhang, J (corresponding author)，Lanzhou Univ, Coll Civil Engn & Mech, Lanzhou 730000, Peoples R China.
来源期刊	PROCESSES
EISSN	2227-9717
出版年	2022
卷号	10 期号:1
英文摘要	The process of aeolian sand transport is an important mechanism leading to the formation and evolution of local landforms in coastal areas and desert lakes. For a long time, the role of surface moisture in incipient motion of sand grains by wind stress has been extensively studied but, in fact, sand-bed collision is the main mechanism in steady aeolian sand flow. At present, the lack of understanding of surface moisture content on sand-bed collision limits the application of aeolian sand transport models in wet coastal areas. In this paper, we adopt numerical simulations to discuss and analyze the effect of cohesive forces formed by surface moisture content on the sand-bed collision process based on discrete element method. High density contact forces appear with the surface moisture increasing, and form a closed structure around the edge of crater to resist the avulsion in horizontal direction. Under high moisture condition, even though the ejected sand grains saltate away from the surface, the tension forces will prevent from leaving. The ejected number trend with incident velocity shows some nonlinear characteristics due to the unequally distributed force chains and liquid bridges in the unsaturated sand bed surface.
英文关键词	aeolian sand transport sand-bed collision water content numerical simulation
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000746963100001
WOS关键词	WIND-TUNNEL ; CAPILLARY FORCES ; ENTRAINMENT ; SALTATION ; SEDIMENT ; GRAINS ; BEACH ; FLUX ; CONTACT ; EROSION
WOS类目	Engineering, Chemical
WOS研究方向	Engineering
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/376793
作者单位	[Dun, Hongchao; Yue, Peng; Huang, Ning; Zhang, Jie] Lanzhou Univ, Key Lab Mech Disaster & Environm Western China, Lanzhou 730000, Peoples R China; [Dun, Hongchao; Yue, Peng; Zhang, Jie] Lanzhou Univ, Coll Civil Engn & Mech, Lanzhou 730000, Peoples R China; [Huang, Ning] Lanzhou Jiaotong Univ, Key Lab Serv Environm & Intelligent Operat & Main, Lanzhou 730070, Peoples R China; [Huang, Ning] Lanzhou Jiaotong Univ, Sch Mech Engn, Lanzhou 730070, Peoples R China
推荐引用方式 GB/T 7714	Dun, Hongchao,Yue, Peng,Huang, Ning,et al. Discrete Element Simulation on Sand-Bed Collision Considering Surface Moisture Content[J],2022,10(1).
APA	Dun, Hongchao,Yue, Peng,Huang, Ning,&Zhang, Jie.(2022).Discrete Element Simulation on Sand-Bed Collision Considering Surface Moisture Content.PROCESSES,10(1).
MLA	Dun, Hongchao,et al."Discrete Element Simulation on Sand-Bed Collision Considering Surface Moisture Content".PROCESSES 10.1(2022).