The Effect of Reynolds Number on Local Scour Around a Monopile

X. Lou, L. Cheng, Z. Chen, G. Tang, F. Yang

Research output: Chapter in Book/Conference paperConference paperpeer-review

Abstract

The effect of Reynolds number (Re) on the local scour around a monopile in steady current was investigated experimentally. Tests were performed using circular piles with various diameters under two different freestream velocities, covering both clear-water and live-bed scour conditions and a Re number range of approximately 9,000-60,000. The time-series of the scour depth at the front face of the pile was measured during the whole scour process and the three-dimensional (3D) scour profile around the pile was scanned at the end of each test using a 3D profiler. The normalized maximum scour depth and scour extent are found to decrease with increasing Re and reaches to a constant value at the high end of Re under both clear-water and live-bed scour conditions. An empirical equation of the dependence of equilibrium scour depth on Re is proposed based on the experimental results. The slope angle of the scour pit is found to be relatively independent of Re and close to the repose angle of the sediments.

Original languageEnglish
Title of host publicationAPAC 2019
Subtitle of host publicationProceedings of the 10th International Conference on Asian and Pacific Coasts, 2019, Hanoi, Vietnam
EditorsNguyen Trung Viet, Tran Thanh Tung, Dou Xiping
Place of PublicationSingapore
PublisherSpringer
Pages1139-1145
Number of pages7
ISBN (Print)978-981-15-0290-3
DOIs
Publication statusPublished - 2020
Event10th International Conference on Asian and Pacific Coasts (APAC) - Hanoi, Viet Nam
Duration: 25 Sept 201928 Sept 2019

Conference

Conference10th International Conference on Asian and Pacific Coasts (APAC)
Country/TerritoryViet Nam
CityHanoi
Period25/09/1928/09/19

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