气候变化领域集成服务门户(CCPortal): Abrasion of yardangs

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DOI	10.1103/PhysRevE.84.031304
	Abrasion of yardangs
	Wang, Zhen-Ting; Wang, Hong-Tao; Niu, Qing-He; Dong, Zhi-Bao; Wang, Tao
发表日期	2011
ISSN	1539-3755
卷号	84 期号:3
英文摘要	A model for the collision between a sand grain and a body of yardang material is established by using the principles of classical mechanics. A new nondimensional parameter, the "abrasion number" A(n), is derived from the model. The volume removed per impact for different targets is proportional to A(n) approximately. As an indicator of the energy ratio of the impacting material to the target material, A(n) not only reflects the previous "abrasion law" but also introduces two dominant mechanical parameters, Young's modulus and yield stress. We propose A(n) to be a similarity criterion for abrasion experiments. The practicability of the model under natural conditions is examined by an example. It is concluded that the abrasion rates of yardangs in the western Qaidam basin, China, are 0.011-0.398 mm/yr in the period of 1986 to 2010 and remarkable abrasion events generally correspond with strong wind conditions. The model will be helpful for reconstructing the history of aeolian activities from the morphologies of yardangs in the arid regions on Mars.
学科领域	Physics
语种	英语
WOS研究方向	Physics, Fluids & Plasmas ; Physics, Mathematical
来源期刊	PHYSICAL REVIEW E
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/111621
作者单位	Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, Key Lab Desert & Desertificat, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Wang, Zhen-Ting,Wang, Hong-Tao,Niu, Qing-He,et al. Abrasion of yardangs[J]. 中国科学院西北生态环境资源研究院,2011,84(3).
APA	Wang, Zhen-Ting,Wang, Hong-Tao,Niu, Qing-He,Dong, Zhi-Bao,&Wang, Tao.(2011).Abrasion of yardangs.PHYSICAL REVIEW E,84(3).
MLA	Wang, Zhen-Ting,et al."Abrasion of yardangs".PHYSICAL REVIEW E 84.3(2011).