Effect of Wave Skewness and Sediment Particle Size on Sediment Transport Due to Combined Wave–Current Seabed Boundary Layer Streaming
Publication: Journal of Hydraulic Engineering
Volume 148, Issue 9
Abstract
The effect of wave skewness and sediment particle size on near-bed sediment dynamics and transport owing to wave-induced streaming is examined in this study. Here, wave-dominated flow over a flat rough bed is studied, with wave propagation forming a nonzero angle with the current. It was observed that the increase in wave skewness increases the mean sediment transport, which is consistent with prior findings for the particular situation of horizontally uniform Stokes forcing. The mean sediment transport beneath combined second-order Stokes waves and current has been investigated for fine, medium, and coarse sand, respectively. Due to inertia, both the mean bed-load vector and the depth-integrated suspended flux vector are less rotated (relative to the wave propagation direction) for coarse sand than for fine sand. The mean bed-load transport is largest for coarse sand, whereas the mean suspended sediment transport is largest for fine sand.
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Data Availability Statement
All data, models, or code that support the findings of this study are available from the corresponding author upon reasonable request.
Acknowledgments
This work was carried out mainly as a part of the strategical university program “Air-Sea Interaction and Transport Mechanisms in the Ocean,” funded by the Norwegian Research Council. Further work was supported by Early Carrier Research Award titled “Large Scale CFD Modelling of Hydrodynamics and Scour around Offshore Wind Farms,” funded by the Science and Engineering Research Board (SERB), Department of Science and Technology, India. The Grant number is ECR/2018/000284. Both the supports are gratefully acknowledged.
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Journal of Hydraulic Engineering
Volume 148 • Issue 9 • September 2022
Copyright
© 2022 American Society of Civil Engineers.
History
Received: Oct 5, 2021
Accepted: May 12, 2022
Published online: Jul 13, 2022
Published in print: Sep 1, 2022
Discussion open until: Dec 13, 2022
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