Conference paper
Hydrodynamics under Large-Scale Waves Breaking over a Barred Beach
University of Catania1
Université Grenoble Alpes2
Utrecht University3
University of Aberdeen4
University of Twente5
University of Messina6
University of Liverpool7
Fluid Mechanics, Coastal and Maritime Engineering, Department of Mechanical Engineering, Technical University of Denmark8
Department of Mechanical Engineering, Technical University of Denmark9
Polytechnic University of Catalonia10
University of Hull11
...and 1 moreThis paper shows preliminary results of experiments obtained in a large-scale wave flume under monochromatic waves plunging over a fixed bar. Velocity measurements were conducted using acoustic and optical instruments at 22 cross-shore locations ranging from the final part of the shoaling zone up to the inner surf zone.
The measurements included the bottom boundary layer and the lower part of the water column and provided insights on the mean velocity distribution, turbulent velocity fluctuations and Reynolds stresses. The mean velocity is generally seaward directed. Magnitudes of the mean velocity are small in the shoaling region and increase above the bar crest, especially in the higher part of the water column, while magnitudes in the boundary layer are relatively small.
Fluid from the inner surf zone is transported offshore by the undertow and pushed up near the shoreward face of the bar, thus largely feeding the onshore mass transport above trough level. As a result a large recirculation cell located just above the trough of the bar is generated where currents and turbulent velocity fluctuations are strong.
Language: | English |
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Year: | 2018 |
Proceedings: | 7th International Conference on the Application of Physical Modelling in Coastal and Port Engineering and Science (Coastlab18) |
Types: | Conference paper |
ORCIDs: | Larsen, Bjarke Eltard , Carstensen, Stefan and Fuhrman, David R. |