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《Advances In Water Science》 2002-02
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Experimental study on velocity fluctuations of suspended particles

LI Dan-xun, WANG Xing-kui, YU Ming-zhong (Key Laboratory for Water and Sediment Sciences, Tsinghua University, Beijing 100084, China)  
The image processing technique was applied to measure velocity fluctuations of suspended particles in open channel flows. Two kinds of spherical particles were studied: plastic particles (d=0.1~1.5 mm) and glass particles (d=0.1~0.3 mm). Experimental results reveal that: (1) coarse particles possess greater velocity fluctuations than fine particles in the near bed region, while the scenario is completely opposite in the upper flow; (2) the velocity fluctuation of fine particles is a function of y/h, and for coarse particles, the velocity fluctuations relate not only to y/h but also to the shear stress;and (3) the plastic particles have greater velocity fluctuations than glass particles of the same size.
【Fund】: 国家自然科学基金资助项目 ( 5 94 790 1 2 5 0 0 0 90 0 3)~~
【CateGory Index】: TV142
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1 LI Dan\|xun, WANG Xing\|kui, WANG Dian\|chang (Tsinghua University, Beijing 100084);Effect of Velocity Gradient on the Turbulent Intensity of Suspended Particles[J];JOURNAL OF SEDIMENT RESEARCH;2000-03
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1 YI Fan XU Minghou YU Dunxi (Huazhong University of Science and Technology, WuHan 430074);Progress and Prospective in Research on Particulate Matter Emission from Combustion[J];World Sci-tech R & D;2002-02
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