Hydrophysics

Hydrophysics

Control of Scour in Front of Piers Using a Curved Deflecting Nose

Document Type : Original Article

Authors
Morteza Bakhtiari 1
Mohsen Solimani Babarsad 2
Abbas Safaei 3
1 Faculty of Marine Engineering, Khorramshahr University of marine science and technology khorramshahr,Iran
2 Department of Water Sciences, Water Science and Environmental Research Center, Shoushtar Branch, Islamic Azad University, Shoushtar, Iran.
3 Water Science and Environmental Research Center, Shoushtar Branch, Islamic Azad University, Shoushtar, Iran
Abstract
Local scour around pier foundations is the primary cause of pier damage. Numerous studies have addressed this phenomenon, proposing various protection methods that can be broadly classified into direct and indirect approaches. One effective indirect method to reduce scour depth is by modifying the flow patterns around the pier through altering the nose shape of the pier. This experimental study investigates the effect of changing the pier nose shape aligned with the flow direction. Curved-nose piers with arc radii of 52.28 cm, 20.20 cm, 12.09 cm, and 11.06 cm were tested under clear-water conditions. Results show that the pier with the smallest radius (11.06 cm) exhibited the best performance, achieving optimal scour reduction at relative flow velocities up to 95% of the particle incipient motion threshold velocity.
Keywords
Scour
Pier
Curved Nose Radius
Incipient Motion

Subjects

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  • Receive Date 23 December 2024
  • Revise Date 10 February 2025
  • Accept Date 09 March 2025