Reconstructing The Vertical Distribution Of The Aeolian Saltation Mass Flux Based On The Probability Distribution Of Lift-Off Velocity

doi:10.1016/j.geomorph.2007.07.005

IMECH-IR > 力学所知识产出(1956-2008)

	Reconstructing The Vertical Distribution Of The Aeolian Saltation Mass Flux Based On The Probability Distribution Of Lift-Off Velocity
	Kang LQ; Guo LJ; Liu DY(刘大有); Kang, LQ (reprint author), Chinese Acad Sci, Inst Mech, Div Engn Sci, Beijing 100080, Peoples R China.
发表期刊	Geomorphology
	2008
页码	1-15
ISSN	0169-555X
摘要	The probability distribution of lift-off velocity of the saltating grains is a bridge to linking microscopic and macroscopic research of aeolian sand transport. The lift-off parameters of saltating grains (i.e., the horizontal and vertical lift-off velocities, resultant lift-off velocity, and lift-off angle) in a wind tunnel are measured by using a Phase Doppler Particle Analyzer (PDPA). The experimental results show that the probability distribution of horizontal lift-off velocity of saltating particles on a bed surface is a normal function, and that of vertical lift-off velocity is an exponential function. The probability distribution of resultant lift-off velocity of saltating grains can be expressed as a log-normal function, and that of lift-off angle complies with an exponential function. A numerical model for the vertical distribution of aeolian mass flux based on the probability distribution of lift-off velocity is established. The simulation gives a sand mass flux distribution which is consistent with the field data of Namikas (Namikas, S.L., 2003. Field measurement and numerical modelling of acolian mass flux distributions on a sandy beach, Sedimentology 50, 303-326). Therefore, these findings are helpful to further understand the probability characteristics of lift-off grains in aeolian sand transport. (c) 2007 Elsevier B.V. All rights reserved.
关键词	Aeolian Saltation Lift-off Velocity Probability Distribution Vertical Distribution Of Mass Flux Atmospheric Boundary-layer Impact Process Sand Wind Grains Bed Collisions Transport Simulations Speed
DOI	10.1016/j.geomorph.2007.07.005
收录类别	SCI
语种	英语
WOS记录号	WOS:000254789200001
关键词[WOS]	ATMOSPHERIC BOUNDARY-LAYER ; IMPACT PROCESS ; SAND ; WIND ; GRAINS ; BED ; COLLISIONS ; TRANSPORT ; SIMULATIONS ; SPEED
WOS研究方向	Physical Geography ; Geology
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
引用统计	被引频次：24[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/311007/26082
专题	力学所知识产出(1956-2008)
通讯作者	Kang, LQ (reprint author), Chinese Acad Sci, Inst Mech, Div Engn Sci, Beijing 100080, Peoples R China.
推荐引用方式 GB/T 7714	Kang LQ,Guo LJ,Liu DY,et al. Reconstructing The Vertical Distribution Of The Aeolian Saltation Mass Flux Based On The Probability Distribution Of Lift-Off Velocity[J]. Geomorphology,2008:1-15.
APA	Kang LQ,Guo LJ,刘大有,&Kang, LQ .(2008).Reconstructing The Vertical Distribution Of The Aeolian Saltation Mass Flux Based On The Probability Distribution Of Lift-Off Velocity.Geomorphology,1-15.
MLA	Kang LQ,et al."Reconstructing The Vertical Distribution Of The Aeolian Saltation Mass Flux Based On The Probability Distribution Of Lift-Off Velocity".Geomorphology (2008):1-15.

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