Numerical Study for Negative Step Stilling Basin

Nassar, Mohammad Ahmad; Abdelaal, Gamal Mohamed Mostafa; Farahat, Hany Abdel Hamid; Tarbak, Abdelazim Mohamed Ali; Ismail, Ahmad Abdel Alim Mohammad; Eltohamy, Eslam El-Sayed Mohamed

doi:10.21608/eijest.2023.181128.1207

Numerical Study for Negative Step Stilling Basin

Document Type : Original Article

Authors

¹ Water and Water Structures Engineering Department Faculty of Engineering, Zagazig University, Zagazig, Egypt.

² Water and Water Structures Engineering Department, Faculty of Engineering, Zagazig University, Zagazig, Egypt

³ Water and Water Structures Engineering Department, Faculty of Engineering, Zagazig University, Zagazig, Egypt.

⁴ Professor of Hydraulics and Water Structures, National Center for Water Research, Egypt.

10.21608/eijest.2023.181128.1207

Abstract

The hydraulic jump is considered one of the most effective methods in dissipating energy through the stilling basin downstream of the control structures. The energy dissipation in the stilling basin contributes to protecting the area ‎downstream of the control structures from erosion. The aim of this study is to calibrate the Flow 3D program using published practical experiments by Willi H. Hager & Nicola V. Bretz (1986).‎ A three-dimensional numerical simulation was performed using the Flow 3D program to investigate the dissipation of energy due to hydraulic jump through stilling basins with negative steps and compare the results of the study with the results of the practical experiments in the research of Willi H. Hager & Nicola V. Bretz (1986).

It was clear from the comparison that the program has a high ability to simulate the phenomenon and to show results that are close to reality with an error not more than 10%.

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