Experimental Investigation Of Particle Velocity Distributions In Windblown Sand Movement

doi:10.1007/s11433-008-0120-8

IMECH-IR > 力学所知识产出(1956-2008)

	Experimental Investigation Of Particle Velocity Distributions In Windblown Sand Movement
	Kang LQ; Guo LJ; Liu DY(刘大有); Kang, LQ (reprint author), Xian Jiaotong Univ, State Key Lab Multiphase Flow Power Engn, Xian 710049, Peoples R China.
发表期刊	Science In China Series G-Physics Mechanics & Astronomy
	2008
页码	986-1000
ISSN	1672-1799
摘要	With the PDPA (Phase Doppler Particle Analyzer) measurement technology, the probability distributions of particle impact and lift-off velocities on bed surface and the particle velocity distributions at different heights are detected in a wind tunnel. The results show that the probability distribution of impact and lift-off velocities of sand grains can be expressed by a log-normal function, and that of impact and lift-off angles complies with an exponential function. The mean impact angle is between 28 degrees and 39 degrees, and the mean lift-off angle ranges from 30 degrees to 44 degrees. The mean lift-off velocity is 0.81-0.9 times the mean impact velocity. The proportion of backward-impacting particles is 0.05-0.11, and that of backward-entrained particles ranges from 0.04 to 0.13. The probability distribution of particle horizontal velocity at 4 mm height is positive skew, the horizontal velocity of particles at 20 mm height varies widely, and the variation of the particle horizontal velocity at 80 mm height is less than that at 20 mm height. The probability distribution of particle vertical velocity at different heights can be described as a normal function.
关键词	Windblown Sand Movement Probability Distribution Particle Velocity Sediment-transport Wind-tunnel Blown Sand Surface Cloud Saltation Grains Model Flux
DOI	10.1007/s11433-008-0120-8
收录类别	SCI
语种	英语
WOS记录号	WOS:000257751400006
关键词[WOS]	SEDIMENT-TRANSPORT ; WIND-TUNNEL ; BLOWN SAND ; SURFACE ; CLOUD ; SALTATION ; GRAINS ; MODEL ; FLUX
WOS研究方向	Physics
WOS类目	Physics, Multidisciplinary
引用统计	被引频次：14[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/25962
专题	力学所知识产出(1956-2008)
通讯作者	Kang, LQ (reprint author), Xian Jiaotong Univ, State Key Lab Multiphase Flow Power Engn, Xian 710049, Peoples R China.
推荐引用方式 GB/T 7714	Kang LQ,Guo LJ,Liu DY,et al. Experimental Investigation Of Particle Velocity Distributions In Windblown Sand Movement[J]. Science In China Series G-Physics Mechanics & Astronomy,2008:986-1000.
APA	Kang LQ,Guo LJ,刘大有,&Kang, LQ .(2008).Experimental Investigation Of Particle Velocity Distributions In Windblown Sand Movement.Science In China Series G-Physics Mechanics & Astronomy,986-1000.
MLA	Kang LQ,et al."Experimental Investigation Of Particle Velocity Distributions In Windblown Sand Movement".Science In China Series G-Physics Mechanics & Astronomy (2008):986-1000.

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