收稿日期: 2003-06-30
修回日期: 2003-10-15
网络出版日期: 2004-10-01
基金资助
国家杰出青年科学基金项目“风沙边界层动力学研究”（编号：40225003）；中国科学院寒区旱区环境与工程研究所创新项目“玛多县现代沙漠化过程”（编号：2003110）资助
A STUDY OF THE PARTICLE CONCENTRATION IN THE SAND FLUX—A WIND TUNNEL INVESTIGATION
Received date: 2003-06-30
Revised date: 2003-10-15
Online published: 2004-10-01
王洪涛 , 董治宝 , 张晓航 . 风沙流中沙粒浓度分布的实验研究[J]. 地球科学进展, 2004 , 19(5) : 732 -735 . DOI: 10.11867/j.issn.1001-8166.2004.05.0732
Particle Image Volocimetry(PIV) technology was used to study the particle concentration through the wind tunnel experiment. To get the better results, we used the artificial quartz sand instead of the natural sand. The particle concentrations at three wind velocities were detected by the state of the art measurement. The results show that the concentration of the particles in the sand flux has little change with the horizontal direction, and decreases quickly with height， which can be expressed by an exponential function . The decay rate of the particle concentration has a close relationship with the wind velocity. It increases with the decreasing wind velocity and decreases with the increasing wind velocity. When the sands movement starts, the concentration very close to the sand surface is changeless with the wind velocity.
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