Dissipation of Water Energy by Using a Special Stilling Basin Via Three-dimensional Numerical Model
Yasser El-Saie1, *, Osama Saleh2, Marihan El-Sayed3, Abdelazim Ali4, Eslam El-Tohamy Yasser Mohamed Sadek5
Identifiers and Pagination:Year: 2023
E-location ID: e187414952307110
Publisher ID: e187414952307110
Article History:Received Date: 02/12/2022
Revision Received Date: 18/06/2023
Acceptance Date: 20/06/2023
Electronic publication date: 08/08/2023
Collection year: 2023
open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: https://creativecommons.org/licenses/by/4.0/legalcode. This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
The forced hydraulic jump characteristics were studied numerically using Flow-3D software. Rectangular and semi-cylindrical shape slices were used as obstacles with different arrangements in the stilling basin to dissipate the excess kinetic energy.
Each shape type was tested under five values of discharges (60, 80, 100, 120, and 160 l s-1). The numerical results showed that the obstacles act as good energy dissipators, which decrease the hydraulic jump length and the length of the stilling basin as a result. The best case is installing three semi-cylindrical slices in the stilling basin, and energy dissipation ratios range from 48% to 63%, with an average difference of 14% from the values of classical hydraulic jumps, according to discharge values.
It should be noted that the semi-cylindrical slices have better performance on energy dissipation ratios than rectangular slices, which indicates concave surface models cause the flow to change its direction, and this leads to a stable hydraulic condition.
Results of this work can be applied to a prototype by fixing three semi-cylindrical slices in the stilling basin at relative distances of 0.2, 0.5, and 0.8 from the end of the spillway, and this lead to maximize energy dissipation rates.