Christou, Aristos;
Stoesser, Thorsten;
Xie, Zhihua;
(2025)
Large eddy simulation of three-dimensional vortex structures in cnoidal waves over a submerged step.
Journal of Hydraulic Research
, 63
(3)
pp. 297-319.
10.1080/00221686.2025.2476432.
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Abstract
A three-dimensional (3D) numerical wave tank based on large eddy simulations (LES) is employed to study the interaction of a submerged rectangular step with periodic waves in shallow water depths, with a good agreement with experimental measurements. The effect of step height is studied in terms of wave elevations, vorticity field and 3D vortical structures. The shallow and intermediate cases have limited effect on the water surface fluctuations both upstream and downstream from the structure whereas a dominant wave–structure interaction is observed in the steep case, resulting in wave breaking downstream from the step. The effect of step height variation on 3D vortical structures is also investigated in detail and results suggest that three dimensionality is almost negligible in the shallower step whereas in the remaining cases, dominant 3D effects are formed generating discontinuities in the primary spanwise eddies and forming small billows with zero spanwise vorticity interacting with the floor bed, the structure and the water surface.
| Type: | Article |
|---|---|
| Title: | Large eddy simulation of three-dimensional vortex structures in cnoidal waves over a submerged step |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1080/00221686.2025.2476432 |
| Publisher version: | https://doi.org/10.1080/00221686.2025.2476432 |
| Language: | English |
| Additional information: | This work is licensed under a Creative Commons License. The images or other third-party material in this article are included in the Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ |
| Keywords: | Science & Technology, Technology, Physical Sciences, Engineering, Civil, Water Resources, Engineering, cnoidal waves, large eddy simulations, numerical wave tank, submerged step, wave-structure interaction, vortex generation, WATER-WAVES, RECTANGULAR OBSTACLE, GENERATION, EVOLUTION, BREAKWATERS, CURRENTS, RANS, FLOW |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Civil, Environ and Geomatic Eng |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10211369 |
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