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Article

Investigation of Local Scouring around Hydrodynamic and Circular Pile Groups under the Influence of River Material Harvesting Pits

1
Department of Civil Engineering, Faculty of Engineering, University of Maragheh, Maragheh 8311155181, Iran
2
Department of Civil Engineering, Faculty of Engineering, University of Zanjan, Zanjan 537138791, Iran
3
Department of Engineering, Niccolò Cusano University, 00166 Rome, Italy
*
Authors to whom correspondence should be addressed.
Academic Editor: Vlassios Hrissanthou
Water 2021, 13(16), 2192; https://doi.org/10.3390/w13162192
Received: 4 June 2021 / Revised: 4 August 2021 / Accepted: 9 August 2021 / Published: 11 August 2021
(This article belongs to the Special Issue Research on Hydraulics and River Dynamics)
Mining activities can endanger the stability of hydraulic structures. Numerical modeling of local scouring around hydrodynamic and circular bridge pile groups, due to the action of clear water conditions via non-cohesive sediment, was performed using a computational fluid dynamics (CFD) model, a large eddy simulation (LES) turbulence model, and a van Rijn sedimentary model with FLOW-3D software. The pile groups were positioned upstream and downstream of a sand mining pit. The results showed that the scour depth around the downstream pile group was greater than that of the upstream one. Using hydrodynamic piers reduced the scour depth upstream of all piers and the material harvesting pit. The maximum reduction in scour depth was observed in front of the fifth pier, with a 29% reduction in scour depth. Additionally, for all models, as the material harvesting pit was moved downstream, the downstream turbulence was enhanced and stronger flow reversal and horseshoe vortices were detected in from of the downstream pile group. The flow patterns around the pile group showed that the presence of hydrodynamic piers in the upstream pile group leads to a decrease in the maximum flow velocity, whereas, when such piers were positioned in the downstream pile group, the velocity increases. View Full-Text
Keywords: local scouring; bridge pile group; material harvesting pit; hydrodynamic bridge pier; flow pattern; FLOW-3D local scouring; bridge pile group; material harvesting pit; hydrodynamic bridge pier; flow pattern; FLOW-3D
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MDPI and ACS Style

Daneshfaraz, R.; Ghaderi, A.; Sattariyan, M.; Alinejad, B.; Asl, M.M.; Di Francesco, S. Investigation of Local Scouring around Hydrodynamic and Circular Pile Groups under the Influence of River Material Harvesting Pits. Water 2021, 13, 2192. https://doi.org/10.3390/w13162192

AMA Style

Daneshfaraz R, Ghaderi A, Sattariyan M, Alinejad B, Asl MM, Di Francesco S. Investigation of Local Scouring around Hydrodynamic and Circular Pile Groups under the Influence of River Material Harvesting Pits. Water. 2021; 13(16):2192. https://doi.org/10.3390/w13162192

Chicago/Turabian Style

Daneshfaraz, Rasoul, Amir Ghaderi, Maryam Sattariyan, Babak Alinejad, Mahdi M. Asl, and Silvia Di Francesco. 2021. "Investigation of Local Scouring around Hydrodynamic and Circular Pile Groups under the Influence of River Material Harvesting Pits" Water 13, no. 16: 2192. https://doi.org/10.3390/w13162192

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