| VELOCITY PROFILES OF TURBULENT OPEN CHANNEL FLOWS |
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| 引用本文： | WANG Dianchang,WANG Xingkui,YU Mingzhong and LI Danxun Doctor, Prof, Dept. of Hydraulic Engineering,Tsinghua University,Beijing,100084,China. VELOCITY PROFILES OF TURBULENT OPEN CHANNEL FLOWS[J]. 国际泥沙研究, 2001, 16(1) |
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| 作者姓名： | WANG Dianchang WANG Xingkui YU Mingzhong and LI Danxun Doctor Prof Dept. of Hydraulic Engineering Tsinghua University Beijing 100084 China |
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| 作者单位： | WANG Dianchang，WANG Xingkui，YU Mingzhong and LI Danxun Doctor; Prof; Dept. of Hydraulic Engineering，Tsinghua University，Beijing，100084，China |
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| 摘 要： | 1 INTRODUCTIONThe vertical velocity profile of open channel flows is the most basic infOrmation for the stUdy of flowresistance, channel bed stability, river nuvial process and sediment transport. Although it has been asubject of great interest for many years, there does not exist a consensus on some perPlexing questions,such as the position of the theoretical bed level. In order to investigate the properties of velocity profile,data measured in open channel nows from eight sources were …
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VELOCITY PROFILES OF TURBULENT OPEN CHANNEL FLOWS |
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| WANG Dianchang,WANG Xingkui,Yu Mingzhong,LI Danxun. VELOCITY PROFILES OF TURBULENT OPEN CHANNEL FLOWS[J]. International Journal of Sediment Research, 2001, 16(1) |
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| Authors: | WANG Dianchang WANG Xingkui Yu Mingzhong LI Danxun |
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| Abstract: | The log-law and the wake law of velocity profile for open channel flows are discussed and compared in this paper. Experimental data from eight sources are used to verify the velocity distribution models.The effect of bed level on the velocity profile is analyzed. A formula to calculate the maximum velocity is proposed. In the region of y ＜δm , the velocity profile approximately follows the log-law. For the region of y ＞δm , the effect of the aspect ratio is considered. A new velocity profile model on the basis of log-law that can unify all of the hydraulic bed roughness is presented. |
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| Keywords: | Velocity profile Open channel flow Log-law Wake law |
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