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Numerical simulation of sediment transport in a U-shaped channel with lateral intake: Effects of intake position and diversion angle

Author

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  • Keivan Tavakoli

    (Department of Civil Engineering, Yasouj University, Yasouj, Iran)

  • Hossien Montaseri

    (Department of Civil Engineering, Yasouj University, Yasouj, Iran)

  • Pourya Omidvar

    (#x2020;Department of Mechanical Engineering, Yasouj University, Yasouj, Iran)

  • Stefania Evangelista

    (#x2021;Department of Civil and Mechanical Engineering, University of Cassino and Southern Lazio, Italy)

Abstract

In this work, the mechanism of sediment transport in a U-shaped channel with a lateral intake is investigated experimentally and numerically, together with the processes of sediment entry into the intake itself and formation of bed topography.Dry sediment is injected into a steady flow in a rigid channel with a bend and sediment particles are traced in time. In order to validate the numerical model, the three components of the flow velocity, as well as the sediment path in time and the diverted sediment ratios, are measured experimentally. A numerical Discrete Phase Model (DPM) is then applied to study the effect of the intake position and diversion angle on the sediment transport mechanism in the bend. The DPM has, in fact, the capability of specifying for each particle its position relative to a reference time and space and, thereby, it is used in this study to analyze the phenomenon evolution and determine the sediment particles diverted into the intake.The comparison between the experimental data and the DPM numerical results shows a good agreement. In order to investigate the mechanism of sediment transport and to evaluate the percentage of the diverted sediments, a parametric study is then conducted through the numerical model, with different positions of the outer bend of the channel, diversion angles of the lateral intake and diversion discharge ratios.The results show that the mechanism of sediment entry into the lateral intake is affected by the diversion discharge ratio. For low discharge ratios, the mechanism of sediment entry to the lateral intake only consists of continuous entrance from the upstream edge of the intake. With the increase of the discharge ratio, it consists of a continuous entrance from the downstream edge and a periodic entrance from the upstream edge of the intake.The DPM results show that, for all diversion discharge ratios, the minimum percentage of sediment entered into the lateral intake corresponds to the position of 120∘ and diversion angle equal to 50∘.

Suggested Citation

  • Keivan Tavakoli & Hossien Montaseri & Pourya Omidvar & Stefania Evangelista, 2019. "Numerical simulation of sediment transport in a U-shaped channel with lateral intake: Effects of intake position and diversion angle," International Journal of Modern Physics C (IJMPC), World Scientific Publishing Co. Pte. Ltd., vol. 30(09), pages 1-26, September.
    • Handle: RePEc:wsi:ijmpcx:v:30:y:2019:i:09:n:s0129183119500712
    DOI: 10.1142/S0129183119500712
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    Cited by:

    1. Wenlong Zhao & Jian Zhang & Wei He & Lin shi & Xuyun Chen, 2022. "Effects of Diversion Wall on the Hydrodynamics and Withdrawal Sediment of A Lateral Intake," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 36(3), pages 1057-1073, February.

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