Three dimensional velocity field underneath a breaking rogue wave
Wave breaking has large impact on stresses and loading on marine structures, but it is not yet accounted for in the design process. A numerical investigation is here presented to fully assess the three-dimensional velocity field underneath a breaking wave. The breaking onset is achieved by modulatin...
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American Society of Mechanical Engineers (ASME)
2017
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Online Access: | http://hdl.handle.net/1959.3/440287 https://doi.org/10.1115/OMAE201761237 |
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ftswinburne:tle:c22b9623-f065-46ee-88fb-ef26c1b5360b:28f49f06-0da8-44be-9edc-ad1dd0a9c582:1 2023-05-15T14:24:43+02:00 Three dimensional velocity field underneath a breaking rogue wave Alberello, Alberto Pakodzi, Csaba Nelli, Filippo Bitner-Gregersen, Elzbieta M. Toffoli, Alessandro Swinburne University of Technology 2017 http://hdl.handle.net/1959.3/440287 https://doi.org/10.1115/OMAE201761237 unknown American Society of Mechanical Engineers (ASME) http://hdl.handle.net/1959.3/440287 https://doi.org/10.1115/OMAE201761237 Copyright © 2017 by ASME. Proceedings of the 36th ASME 2017 International Conference on Ocean, Offshore and Arctic Engineering (OMAE), Trondheim, Norway, 25–30 June 2017 , Vol. 3A Structures, Safety and Reliability, Paper no. OMAE2017-61237, pp. V03AT02A009 Conference paper 2017 ftswinburne https://doi.org/10.1115/OMAE201761237 2021-01-25T23:26:57Z Wave breaking has large impact on stresses and loading on marine structures, but it is not yet accounted for in the design process. A numerical investigation is here presented to fully assess the three-dimensional velocity field underneath a breaking wave. The breaking onset is achieved by modulating an initial monochromatic wave with infinitesimal sideband perturbations. The latter triggers a nonlinear energy transfer, which allows one individual waves to grow and break once the steepness has overcome a specific threshold. Numerical simulations of the Navier-Stokes equations are carried out by means of the open source CFD code OpenFOAM. To speed up the simulation process, the nonlinear evolution of the perturbed Stokes wave is first obtained with a High-Order Spectral Method (HOSM) until the onset of breaking; surface elevation and velocity field are then transferred to the CFD for the final stage of the breaking process. The fully three-dimensional turbulent kinematic field is presented and discussed with reference to the velocity field predicted by the theory. Conference Object Arctic Swinburne University of Technology: Swinburne Research Bank |
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Open Polar |
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Swinburne University of Technology: Swinburne Research Bank |
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ftswinburne |
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description |
Wave breaking has large impact on stresses and loading on marine structures, but it is not yet accounted for in the design process. A numerical investigation is here presented to fully assess the three-dimensional velocity field underneath a breaking wave. The breaking onset is achieved by modulating an initial monochromatic wave with infinitesimal sideband perturbations. The latter triggers a nonlinear energy transfer, which allows one individual waves to grow and break once the steepness has overcome a specific threshold. Numerical simulations of the Navier-Stokes equations are carried out by means of the open source CFD code OpenFOAM. To speed up the simulation process, the nonlinear evolution of the perturbed Stokes wave is first obtained with a High-Order Spectral Method (HOSM) until the onset of breaking; surface elevation and velocity field are then transferred to the CFD for the final stage of the breaking process. The fully three-dimensional turbulent kinematic field is presented and discussed with reference to the velocity field predicted by the theory. |
author2 |
Swinburne University of Technology |
format |
Conference Object |
author |
Alberello, Alberto Pakodzi, Csaba Nelli, Filippo Bitner-Gregersen, Elzbieta M. Toffoli, Alessandro |
spellingShingle |
Alberello, Alberto Pakodzi, Csaba Nelli, Filippo Bitner-Gregersen, Elzbieta M. Toffoli, Alessandro Three dimensional velocity field underneath a breaking rogue wave |
author_facet |
Alberello, Alberto Pakodzi, Csaba Nelli, Filippo Bitner-Gregersen, Elzbieta M. Toffoli, Alessandro |
author_sort |
Alberello, Alberto |
title |
Three dimensional velocity field underneath a breaking rogue wave |
title_short |
Three dimensional velocity field underneath a breaking rogue wave |
title_full |
Three dimensional velocity field underneath a breaking rogue wave |
title_fullStr |
Three dimensional velocity field underneath a breaking rogue wave |
title_full_unstemmed |
Three dimensional velocity field underneath a breaking rogue wave |
title_sort |
three dimensional velocity field underneath a breaking rogue wave |
publisher |
American Society of Mechanical Engineers (ASME) |
publishDate |
2017 |
url |
http://hdl.handle.net/1959.3/440287 https://doi.org/10.1115/OMAE201761237 |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
Proceedings of the 36th ASME 2017 International Conference on Ocean, Offshore and Arctic Engineering (OMAE), Trondheim, Norway, 25–30 June 2017 , Vol. 3A Structures, Safety and Reliability, Paper no. OMAE2017-61237, pp. V03AT02A009 |
op_relation |
http://hdl.handle.net/1959.3/440287 https://doi.org/10.1115/OMAE201761237 |
op_rights |
Copyright © 2017 by ASME. |
op_doi |
https://doi.org/10.1115/OMAE201761237 |
_version_ |
1766297159134609408 |