Studying the Shape Effect of Piers On the Vortices in Open Channels | ||||
| Engineering Research Journal (Shoubra) | ||||
| Volume 51, Issue 2, April 2022, Page 156-161 PDF (992.6 K) | ||||
| Document Type: Research articles | ||||
| DOI: 10.21608/erjsh.2022.237596 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
| Alaa Nabil El-Hazek1; Wedyain Elsayed Metwalley1; Neveen Badawy Abdel-Mageed1; Ahmed Moustafa A. Moussa22; Osama A. Gaheen3 | ||||
| 1Civil Engineering Department, Faculty of Engineering at Shoubra, Benha University | ||||
| 2Coastal Research Institute, National Water Research Center | ||||
| 3Mechanical Engineering Department, Institute of Aviation Engineering and Technology | ||||
| Abstract | ||||
| Scour is one of the most important natural phenomena that directly affect the safety of water structures. Scour is formed due to vortices formation in the water flow in river and open channels. It also works to move materials from the bottom and banks of the watercourse near the bridge structures. The main objective of this paper is to study pier shape effect on minimizing vortices formation and consequently scouring. To achieve this objective, experiments were carried out using a flume in Imbaba Flight Institute Hydraulic Laboratory, Egypt. Five different shapes of piers with a constant discharge were used, which are circular, square, oblique square, a square with circular noses, and oblique rectangular piers. From the obtained results, it was concluded that the best shape of the pier is the square with circular noses achieving the least length and width of the formed scour holes behind it. While the worst shape is the square pier achieving the largest length and width of the formed scour holes behind it. The values of difference of the scour holes length for the oblique rectangular, the circular pier, the oblique square pier, and the square pier compared to the square with circular noses are more by 46%, 114%, 124%, and 243%, respectively. The values of difference of the scour holes width for the circular pier, the oblique rectangular pier, the oblique square pier, and the square pier compared to the square with circular noses are more by 40%, 108%, 117%, and 220%, respectively | ||||
| Keywords | ||||
| scouring; sedimentation; water structures; bridges; piers | ||||
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