Aeolian Creep Transport: Theory and Experiment

doi:10.1029/2020GL088644

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	Aeolian Creep Transport: Theory and Experiment
	Wang, Peng 1,2; Zhang, Jie 1; Dun, Hongchao 1; Herrmann, Hans J.3,4; Huang, Ning 1
	2020-08-16
关键词	Wind tunnelsAnalytic expressions Geophysical phenomena Layer thickness Power-scaling Quantitative prediction Steady state Transport rate Wind tunnel experiment
卷号	47
期号	15
DOI	10.1029/2020GL088644
英文摘要	Aeolian sand transport drives geophysical phenomena, such as bedform evolution and desertification. Creep plays a crucial, yet poorly understood, role in this process. We present a model for aeolian creep, making quantitative predictions for creep fluxes, which we verify experimentally. We discover that the creep transport rate scales like the Shields number to the power 5/2, clearly different from the laws known for saltation. We derive this 5/2 power scaling law from our theory and confirm it with meticulous wind tunnel experiments. We calculate the creep flux and layer thickness in steady state exactly and for the first time study the relaxation of the flux toward saturation, obtaining an analytic expression for the relaxation time. © 2020. The Authors.
会议录	Geophysical Research Letters
会议录出版者	Blackwell Publishing Ltd
语种	英语
ISSN号	00948276
WOS研究方向	Geology
WOS记录号	WOS:000560376100013
内容类型	会议论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/132643]
专题	兰州理工大学
作者单位	1.Key Laboratory of Mechanics on Disaster and Environment in Western China, College of Civil Engineering and Mechanics, Lanzhou University, Lanzhou, China; 2.School of Science, Lanzhou University of Technology, Lanzhou, China; 3.PMMH. ESPCI, Paris, France; 4.Departamento de Física, Universidade Federal do Ceara, Fortaleza, Brazil
推荐引用方式 GB/T 7714	Wang, Peng,Zhang, Jie,Dun, Hongchao,et al. Aeolian Creep Transport: Theory and Experiment[C]. 见:.