Modeling of scour downstream of the triangular labyrinth spillway using Flow-3D software

Articles in Press

Document Type : Research Paper

Authors

1 PhD Student, Faculty of Civil Engineering, University of Zanjan, Zanjan, Iran.

2 Associate Professor, Faculty of Civil Engineering, University of Zanjan, Zanjan, Iran

Abstract

In this paper, the results of scour depth (Ds) and scour pit length (Ld) are compared with the experimental results conducted by Elnikhely and Fathy at 4 different discharges, 0.007, 0.008, 0.009 and 0.010 m3/s. The dimensionless parameters are the ratio of scour depth to the depth of the outfall (Yt), i.e. Ds/Yt, and the ratio of scour pit length to the depth of the outfall, i.e. Ld/Yt. It is observed that with increasing discharge, the maximum values of the dimensionless ratios Ds/Yt and Ld/Yt have a decreasing trend. This is because with increasing discharge, the depth of the outfall increases. This research showed that the numerical model has a good ability to simulate the sediment transport and scour process downstream of the triangular convoluted spillway. The numerical results are in good agreement with the experimental results and the rate of change of the scour pit at the bottom of the spillway is close to zero. With increasing discharge, the maximum values of the depth and length of the scour pit have decreased. On average, the difference between the numerical and experimental results is less than 5%. It can be concluded that there is a good agreement between the results. Numerical simulation of physical phenomena allows for a more detailed study of the flow field, velocity vectors and pressure contours, which is also discussed in this article.

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Journal of Modeling in Engineering

Articles in Press, Accepted Manuscript
Available Online from 05 October 2025

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History

  • Receive Date: 21 February 2025
  • Revise Date: 18 May 2025
  • Accept Date: 02 September 2025

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