Wind tunnel experiment of sand velocity in nature aeolian sand transport using particle image velocimetry

被引：0
|
作者：
Tong, Ding [1 ]
Huang, Ning [2 ]
机构：
[1] Key Laboratory of Mechanics on Western Disaster and Environment, Ministry of Education China, Lanzhou, Gansu 730000, China
[2] School of Civil Engineering and Mechanics, Lanzhou University, Lanzhou, Gansu 730000, China
来源：
Gongcheng Lixue/Engineering Mechanics | 2011年 / 28卷 / 07期
关键词：
Sand - Velocimeters - Velocity - Velocity distribution - Wind speed - Velocity measurement - Normal distribution;
D O I：
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中图分类号：
学科分类号：
摘要：
Sand velocity in aeolian sand transport is measured using the PIV system (Particle Imaging Velocimetry) in a wind tunnel. The velocity probability distribution of ascending and descending particles, as well the influences of sand ripple on the sand particle motion are analyzed. The results show that velocity distributions of take-off particles and particles during sand movement accord with logarithm normal distribution. The mean incident velocity of sand particles is 1.005-1.4 times higher than take-off ones with different wind speed. It is found that sand ripples play an important role on the sand particles motion, which is a key factor that can not be neglected.
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页码：229 / 237
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