Knowledge Management System of Institue of Mechanics, CAS
| 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.
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| Source Publication | Geomorphology
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| 2008 | |
| Pages | 1-15 |
| ISSN | 0169-555X |
| Abstract | 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. |
| Keyword | 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 |
| Indexed By | SCI |
| Language | 英语 |
| WOS ID | WOS:000254789200001 |
| WOS Keyword | ATMOSPHERIC BOUNDARY-LAYER ; IMPACT PROCESS ; SAND ; WIND ; GRAINS ; BED ; COLLISIONS ; TRANSPORT ; SIMULATIONS ; SPEED |
| WOS Research Area | Physical Geography ; Geology |
| WOS Subject | Geography, Physical ; Geosciences, Multidisciplinary |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/26082 |
| Collection | 力学所知识产出(1956-2008) |
| Corresponding Author | Kang, LQ (reprint author), Chinese Acad Sci, Inst Mech, Div Engn Sci, Beijing 100080, Peoples R China. |
| Recommended Citation 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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