Characteristics of Initial Development of Plane Jet Scour
Publication: Journal of Hydraulic Engineering
Volume 149, Issue 9
Abstract
Local scour processes can be divided into initial, progressing, and equilibrium stages. Due to its short duration and high scour rate, the initial stage has not been well investigated to date. By applying laser-based technique and particle image velocimetry, this study conducted a series of measurements of scour hole profile and flow field at the beginning of scour hole development for the case of plane jet–induced scour. The results show that the scouring process in the initial stage is dominated by the wall shear, and thus can be classified as shear scour, whereas that in the progressing stage largely is affected by the turbulent vortex, and therefore can be referred to as vortex scour. The two modes of scour could be characterized by different mechanisms of sediment erosion. A bedload model is proposed to analyze the sediment transport for the shear scour, and the results agreed well with the experimental data.
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Data Availability Statement
All data, models, and code generated or used during the study appear in the published article.
Acknowledgments
The authors gratefully acknowledge the financial support from the National Natural Science Foundation of China (Grant Nos. 51979242 and 52109103) and the Zhoushan Science and Technology Program (Grant No. 2022C81007).
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Published In
Journal of Hydraulic Engineering
Volume 149 • Issue 9 • September 2023
Copyright
© 2023 American Society of Civil Engineers.
History
Received: Sep 16, 2022
Accepted: Apr 23, 2023
Published online: Jun 24, 2023
Published in print: Sep 1, 2023
Discussion open until: Nov 24, 2023
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