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Volume 17 Issue 1
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LIU Chun-jing, LI Dan-xun, QU Zhao-song, WANG Xing-kui. Velocity profile of open-channel flows in the transitional roughness region on mobile beds[J]. Advances in Water Science, 2006, 17(1): 49-54.
Citation: LIU Chun-jing, LI Dan-xun, QU Zhao-song, WANG Xing-kui. Velocity profile of open-channel flows in the transitional roughness region on mobile beds[J]. Advances in Water Science, 2006, 17(1): 49-54.
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Velocity profile of open-channel flows in the transitional roughness region on mobile beds

  • Key Laboratory of Water & Sediment Sciences of Ministry of Education, Tsinghua University, Beijing 100084, China

Funds: The study is financially supported by the National Natural Science Foundation of China(No.50279013;50221903).
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  • Received Date: July 22, 2004
  • Revised Date: October 29, 2004
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    • Abstract
  • The experiments on open-channel flows on the rough mobile bed in the transitional region are reported in this paper. The velocity in the flume were measured by a 22D LDA,and the resistance coefficient were calculated with the Einstein's resistance division method. The experimental results show that(1)The Karman constant in the Log-law of the open channel flows in the transition region is smaller than which that of the smooth open channel flows,and the integral parameter B does not coincide well with the Nikuradse's result from the pipe flows;(2)The weak bed load in the flume may cause the drag-reducing effect;and(3)The Reynolds stress and the turbulence distribution are similar to those in the smooth open channel flows.
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    • References (12)
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