Knowledge Management System of Institue of Mechanics, CAS
| Wind Tunnel Experimental Investigation Of Sand Velocity In Aeolian Sand Transport | |
Kang LQ; Guo LJ; Gu ZM; 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 | 438-450 |
| ISSN | 0169-555X |
| Abstract | Sand velocity in aeolian sand transport was measured using the laser Doppler technique of PDPA (Phase Doppler Particle Analyzer) in a wind tunnel. The sand velocity profile, probability distribution of particle velocity, particle velocity fluctuation and particle turbulence were analyzed in detail. The experimental results verified that the sand horizontal velocity profile can be expressed by a logarithmic function above 0.01 in, while a deviation occurs below 0.01 m. The mean vertical velocity of grains generally ranges from -0.2 m/s to 0.2 m/s, and is downward at the lower height, upward at the higher height. The probability distributions of the horizontal velocity of ascending and descending particles have a typical peak and are right-skewed at a height of 4 turn in the lower part of saltation layer. The vertical profile of the horizontal RMS velocity fluctuation of particles shows a single peak. The horizontal RMS velocity fluctuation of sand particles is generally larger than the vertical RMS velocity fluctuation. The RMS velocity fluctuations of grains in both horizontal and vertical directions increase with wind velocity. The particle turbulence intensity decreases with height. The present investigation is helpful in understanding the sand movement mechanism in windblown sand transport and also provides a reference for the study of blowing sand velocity. (C) 2007 Elsevier B.V All rights reserved. |
| Keyword | Pdpa Aeolian Sand Transport Sand Velocity Probability Distribution Wind Tunnel Saltating Grains Blown Sand Surface Collisions Particles Cloud Flux Bed Entrainment Simulation |
| DOI | 10.1016/j.geomorph.2007.08.018 |
| Indexed By | SCI |
| Language | 英语 |
| WOS ID | WOS:000256719500013 |
| WOS Keyword | SALTATING GRAINS ; BLOWN SAND ; SURFACE ; COLLISIONS ; PARTICLES ; CLOUD ; FLUX ; BED ; ENTRAINMENT ; SIMULATION |
| 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/311007/26006 |
| 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,Gu ZM,et al. Wind Tunnel Experimental Investigation Of Sand Velocity In Aeolian Sand Transport[J]. Geomorphology,2008:438-450. |
| APA | Kang LQ,Guo LJ,Gu ZM,刘大有,&Kang, LQ .(2008).Wind Tunnel Experimental Investigation Of Sand Velocity In Aeolian Sand Transport.Geomorphology,438-450. |
| MLA | Kang LQ,et al."Wind Tunnel Experimental Investigation Of Sand Velocity In Aeolian Sand Transport".Geomorphology (2008):438-450. |
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