Volume 16 Issue 3
Sep.  2023
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Xiao-ting Yang, Qian-qian Shang, Hui Xu, Guo-bin Li, Ya-jun Gao, Qi-lin Yang. 2023: Effect of Froude similitude deviation on curved channel simulations: A case study in the Middle Yangtze River. Water Science and Engineering, 16(3): 289-294. doi: 10.1016/j.wse.2023.04.005
Citation: Xiao-ting Yang, Qian-qian Shang, Hui Xu, Guo-bin Li, Ya-jun Gao, Qi-lin Yang. 2023: Effect of Froude similitude deviation on curved channel simulations: A case study in the Middle Yangtze River. Water Science and Engineering, 16(3): 289-294. doi: 10.1016/j.wse.2023.04.005
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Effect of Froude similitude deviation on curved channel simulations: A case study in the Middle Yangtze River

doi: 10.1016/j.wse.2023.04.005

  • a Tibet Agricultural and Animal Husbandry University, Linzhi 860001, China;

  • b State Key Laboratory of HydrologyeWater Resources and Hydraulic Engineering, Nanjing 210029, China;

  • c River and Harbor Engineering Department, Nanjing Hydraulic Research Institute, Nanjing 210029, China

Funds:

This work was supported by the Project of Subsequent Work of the Three Gorges Project (Grant No. SXHXGZ-2020-3).

  • Received Date: 2022-01-07
  • Accepted Date: 2023-04-23
  • Rev Recd Date: 2023-03-24
    Abstract
  • Froude similitude and friction similitude are the two crucial similarity conditions that are often used in physical-scale modeling of rivers. However, models often deviate from Froude similitude when dealing with real-world situations. This study developed several fixed-bed river models with various curvatures to determine the effect of Froude similitude deviation on curved channel modeling. Models were constructed according to the characteristics of the Middle Yangtze River. Differences in longitudinal slope, transverse slope, and main stream line location were measured by varying Froude similitude deviation. The deviations of longitudinal slope and velocity were negligible because friction similitude was accounted for. The transverse slope varied significantly with the Froude similitude deviation, and the main stream line varied with the curvature and Froude similitude deviation. Formulae were derived to estimate the slope deviation. These analyses helped to clarify the feasibility of the method of Froude similitude deviation for curved channels.

     

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