Reconstructing The Vertical Distribution Of The Aeolian Saltation Mass Flux Based On The Probability Distribution Of Lift-Off Velocity
文献类型：期刊论文
| 作者 | Kang LQ; Guo LJ; Liu DY(刘大有)
|
| 刊名 | Geomorphology
 |
| 出版日期 | 2008 |
| 页码 | 1-15 |
| 通讯作者邮箱 | klq@sohu.com |
| 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 |
| ISSN号 | 0169-555X |
| 通讯作者 | Kang, LQ (reprint author), Chinese Acad Sci, Inst Mech, Div Engn Sci, Beijing 100080, Peoples R China. |
| 中文摘要 | 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. |
| 类目[WOS] | Geography, Physical ; Geosciences, Multidisciplinary |
| 研究领域[WOS] | Physical Geography ; Geology |
| 关键词[WOS] | ATMOSPHERIC BOUNDARY-LAYER ; IMPACT PROCESS ; SAND ; WIND ; GRAINS ; BED ; COLLISIONS ; TRANSPORT ; SIMULATIONS ; SPEED |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000254789200001 |
| 公开日期 | 2009-08-03 ; 2009-09-14 |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/26082]  |
| 专题 | 力学研究所_力学所知识产出(1956-2008) |
| 推荐引用方式 GB/T 7714 | Kang LQ,Guo LJ,Liu DY. 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.(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. |
入库方式： OAI收割
来源：力学研究所
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