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Article

Numerical Study on the Hydraulic Properties of Flow over Different Pooled Stepped Spillways

1
Department of Civil Engineering, Faculty of Engineering, University of Zanjan, Zanjan 537138791, Iran
2
Department of Engineering, Niccolò Cusano University, 00166 Rome, Italy
*
Author to whom correspondence should be addressed.
Academic Editor: Dušan Žagar
Water 2021, 13(5), 710; https://doi.org/10.3390/w13050710
Received: 1 February 2021 / Revised: 1 March 2021 / Accepted: 2 March 2021 / Published: 5 March 2021
(This article belongs to the Special Issue Ecohydraulics Modeling and Simulation)
This work presents numerical simulations carried out to study the influence of geometric characteristics of pooled steps on the energy dissipation performance, flow patterns properties, velocity rates, and pressure distributions over a spillway. The localization of the inception point of air entrainment was also assessed, being a key design parameter of spillways. With this aim, different configurations of steps were taken in account, including flat, pooled, and notch pooled types. The computational procedure was first validated with experimental results from the literature and then used to test the hydraulic behavior derived from different geometric configurations. The flat step configuration showed the best energy dissipation performance as compared with other configurations. With the notched pooled step configuration, the efficiency performance of the pooled structure improved by about 5.8%. The interfacial velocities of the flat stepped spillway were smaller than those of the pooled structure. The pressure value at the beginning of the step in the pooled configuration was larger than the flat configuration, while for the notched pool the maximum pressure values decreased near the step pool. Pool configuration (simple or notched) did not have a significant influence on the location of air entrainment. View Full-Text
Keywords: stepped spillway; numerical simulation; pool configuration; flow patterns; energy dissipation stepped spillway; numerical simulation; pool configuration; flow patterns; energy dissipation
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MDPI and ACS Style

Ghaderi, A.; Abbasi, S.; Di Francesco, S. Numerical Study on the Hydraulic Properties of Flow over Different Pooled Stepped Spillways. Water 2021, 13, 710. https://doi.org/10.3390/w13050710

AMA Style

Ghaderi A, Abbasi S, Di Francesco S. Numerical Study on the Hydraulic Properties of Flow over Different Pooled Stepped Spillways. Water. 2021; 13(5):710. https://doi.org/10.3390/w13050710

Chicago/Turabian Style

Ghaderi, Amir; Abbasi, Saeed; Di Francesco, Silvia. 2021. "Numerical Study on the Hydraulic Properties of Flow over Different Pooled Stepped Spillways" Water 13, no. 5: 710. https://doi.org/10.3390/w13050710

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