| EFFECT OF FLOW CONDITIONS ON 3D MOVEMENT CHARACTERISTICS OF PARTICLES |
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| 作者姓名： | Limo TANG Shanghong ZHANG Mingzhong YU Xingkui WANG |
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| 作者单位： | State Key Laboratory of Hydroscience and Engineering, Tsinghua University. Beijing, 100084, China |
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| 摘 要： | 1 INTRODUCTION The mechanism of particle movement in the flow is one of basic problems of sediment transport research. The conventional measurement approaches usually disturb the structure of the flow, consequently inducing errors. With the development of…
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| 关 键 词： | 稳定等速流 水深 水流条件 颗粒跟踪测速 粗颗粒 泥沙运动 三维运动特性 |
| 收稿时间： | 2005-06 |
| 修稿时间： | 2005-09 |
EFFECT OF FLOW CONDITIONS ON 3D MOVEMENT CHARACTERISTICS OF PARTICLES |
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| Limo TANG Shanghong ZHANG Mingzhong YU Xingkui WANG.EFFECT OF FLOW CONDITIONS ON 3D MOVEMENT CHARACTERISTICS OF PARTICLES[J].International Journal of Sediment Research,2006,21(4):272-280. |
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| Authors: | Limo TANG Shanghong ZHANG Mingzhong YU Xingkui WANG |
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| Abstract: | In steady uniform flows with different water depths, experiments with single particles were performed using a Particle Tracking Velocimetry (PTV) technique, and then the mechanism of particle movement was studied statistically. The experimental results showed that the average longitudinal velocity profile of particles conformed to the Log-law. The mean Von Karman constant, к, was 0.393, and the streamwise velocity of particles was lower than that in clear water flow by a ratio of 0.826. The vertical distribution of particle concentration in the suspended load region agreed with the Rouse equation, and the average value of the compensation factor, β, was determined to be 1.50. The turbulence intensity of the particle fluctuation velocity decreased with the increase in the Reynolds number Re. |
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| Keywords: | Coarse particles Water depth 3D movement PTV technique |
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