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Experimental and Numerical Study of the Effects of Geometric Appendance Elements on Energy Dissipation over Stepped Spillway

Department of Civil Engineering, Faculty of Engineering, University of Zanjan, Zanjan 537138791, Iran
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Water 2021, 13(7), 957; https://doi.org/10.3390/w13070957
Received: 2 March 2021 / Revised: 26 March 2021 / Accepted: 29 March 2021 / Published: 31 March 2021
(This article belongs to the Special Issue Physical Modelling in Hydraulics Engineering)
In the stepped spillway, the steps, by providing an artificial roughening bed, dissipate the flow of energy more than other types of spillways, so the construction costs for stilling basin are reduced. However, what is important in this type of spillway is increasing the effectiveness of steps in the rate of energy dissipation. The present study deals with experimental and numerical simulations regarding the influence of geometric appendance elements on the steps and its impact on the energy dissipation performances, flow patterns properties, turbulent kinetic energy, flow resistance and the Darcy roughness. The localization of inception point of air entrainment is also assessed. To this aim, different configurations are taken into account. The computational procedure is validated with experimental results and then used to test the hydraulic behavior of different geometric configurations. The results showed that the appendance elements on the steps increased the turbulent kinetic energy (TKE) values and Darcy–Weisbach friction and the energy dissipation increased significantly. By reducing the height of the elements, energy dissipation and the TKE value increase more significantly. With the appendance elements on step, the air entrainment inception locations a positioning further upstream than the flat step stepped spillway. View Full-Text
Keywords: stepped spillway; appendance elements; TKE and energy dissipation; Darcy–Weisbach friction; inception point. stepped spillway; appendance elements; TKE and energy dissipation; Darcy–Weisbach friction; inception point.
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MDPI and ACS Style

Ghaderi, A.; Abbasi, S. Experimental and Numerical Study of the Effects of Geometric Appendance Elements on Energy Dissipation over Stepped Spillway. Water 2021, 13, 957. https://doi.org/10.3390/w13070957

AMA Style

Ghaderi A, Abbasi S. Experimental and Numerical Study of the Effects of Geometric Appendance Elements on Energy Dissipation over Stepped Spillway. Water. 2021; 13(7):957. https://doi.org/10.3390/w13070957

Chicago/Turabian Style

Ghaderi, Amir; Abbasi, Saeed. 2021. "Experimental and Numerical Study of the Effects of Geometric Appendance Elements on Energy Dissipation over Stepped Spillway" Water 13, no. 7: 957. https://doi.org/10.3390/w13070957

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