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Title: Recent advances in understanding propeller jet flow and its impact on scour
Authors: Wei, Maoxing
Chiew, Yee-Meng
Cheng, Nian-Sheng
Keywords: Engineering::Civil engineering
Issue Date: 2020
Source: Wei, M., Chiew, Y. & Cheng, N. (2020). Recent advances in understanding propeller jet flow and its impact on scour. Physics of Fluids, 32(10), 101303-.
Journal: Physics of Fluids
Abstract: This paper presents an extensive review of the characteristics of a propeller jet-induced flow field and its impact on scour formation. As the driving force of scour, the jet flow behavior is first explored, including both the free and bounded jets under various boundary conditions. Accordingly, their resulting scour, namely, unconfined and confined scour, are expounded in terms of the temporal and spatial development of the scour depth. Hitherto, existing methods for predicting the scour depth are principally developed empirically, which exclude in-depth scrutiny into the mechanism governing the scouring process. With the detailed flow fields obtained in recent research, this paper aims to piece together a state-of-the-art understanding of the scouring mechanism governing confined propeller scour, that is, the combined effect of jet flow and junction flow on the scour hole development. By comparing the similarities and differences between the scouring mechanisms in open and closed quays, this paper provides a comprehensive insight into the scouring process associated with bounded propeller jets. Moreover, in terms of the near-bed flow variations during the scouring process, implications for sediment transport under highly turbulent flow are discussed. Finally, future research needs are identified.
ISSN: 1070-6631
DOI: 10.1063/5.0023266
Rights: © 2020 Author(s). All rights reserved. This paper was published by American Institute of Physics (AIP) in Physics of Fluids and is made available with permission of the Author(s).
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:CEE Journal Articles

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