Seabed Current Boundary Layers in Wave‐Plus‐Current Flow Conditions
Publication: Journal of Waterway, Port, Coastal, and Ocean Engineering
Volume 114, Issue 2
Abstract
The current boundary layer has been investigated with measurements of tidal current and wave velocity made at 0.24, 0.61, 1.22, 1.83, and 3.66 m above a rough seafloor. The logarithmic boundary‐layer flow model was fitted to the measurements determining the roughness and friction velocity parameters. The data presented here cover a wide range of combined current and wave conditions and are of high quality. The measurements and analysis results demonstrate clearly the existence of large boundary‐layer current gradients in the tidal environment. Large values of and were found that depend on the ratio of the wave‐flow component to the current flow component as well as the upstream bottom roughness. Boundary layers in the flow near the seabed can affect the design of offshore structures such as offshore pipelines.
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Published In
Journal of Waterway, Port, Coastal, and Ocean Engineering
Volume 114 • Issue 2 • March 1988
Pages: 161 - 174
Copyright
Copyright © 1988 ASCE.
History
Published online: Mar 1, 1988
Published in print: Mar 1988
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