Nonlinear Evolution of a Steep, Focusing Wave Group in Deep Water Simulated with OceanWave3D
Steep, focusing waves can experience fast and local nonlinear evolution of the spectrum due to wave-wave interactions resulting in energy transfer to both higher and lower wavenumber components. The shape and kinematics of a steep wave may, thus, differ substantially from the predictions of linear t...
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American Society of Mechanical Engineers
2019
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ftdtupubl:oai:pure.atira.dk:publications/6ca1a8b5-719a-47a0-af70-b5d1609b2bdc 2023-05-15T14:23:45+02:00 Nonlinear Evolution of a Steep, Focusing Wave Group in Deep Water Simulated with OceanWave3D Barratt, Dylan Bingham, Harry B. Adcock, Thomas A. A. 2019 https://orbit.dtu.dk/en/publications/6ca1a8b5-719a-47a0-af70-b5d1609b2bdc https://doi.org/10.1115/OMAE2019-95299 eng eng American Society of Mechanical Engineers info:eu-repo/semantics/closedAccess Barratt , D , Bingham , H B & Adcock , T A A 2019 , Nonlinear Evolution of a Steep, Focusing Wave Group in Deep Water Simulated with OceanWave3D . in Proceedings of the ASME 2019 38th International Conference on Ocean, Offshore and Arctic Engineering . vol. Volume 7B: Ocean Engineering , OMAE2019-95299 , American Society of Mechanical Engineers , ASME 38th International Conference on Ocean, Offshore and Arctic Engineering , Glasgow , United Kingdom , 09/06/2019 . https://doi.org/10.1115/OMAE2019-95299 Nonlinear wave mechanics Directional energy transfers wing waves OCEANWAVE3D /dk/atira/pure/sustainabledevelopmentgoals/affordable_and_clean_energy SDG 7 - Affordable and Clean Energy contributionToPeriodical 2019 ftdtupubl https://doi.org/10.1115/OMAE2019-95299 2023-01-12T00:13:00Z Steep, focusing waves can experience fast and local nonlinear evolution of the spectrum due to wave-wave interactions resulting in energy transfer to both higher and lower wavenumber components. The shape and kinematics of a steep wave may, thus, differ substantially from the predictions of linear theory. We have investigated the role of nonlinear interactions on group-shape for a steep, narrow-banded, directionally-spread wave group focusing in deep water using the fully-nonlinear potential flow solver, OceanWave3D. Exact second-order correction of the initial conditions has been implemented together with a novel third-order approximate correction based on a Stokes-type formulation for surface elevation combined with a scaling-argument for the third-order velocity potential. Four-phase separation reveals that the third-order scheme provides a good estimate for the third-order superharmonics. A quantitative assessment of numerical error has also been performed for the spatial and temporal discretization, including energy conservation, a reversibility check and validation against previous simulations performed with a higher-order spectral (HOS) code. The initially narrow-banded amplitude spectrum exhibits the formation of sidelobes at angles of approximately ±35° to the spectral peak during the simulated extreme wave event, occurring in approximately 10 wave periods, with a preferential energy transfer to high-wavenumber components. The directional energy transfer is attributed to resonant third-order interactions with a discussion of the engineering implications. Other Non-Article Part of Journal/Newspaper Arctic Technical University of Denmark: DTU Orbit Volume 7B: Ocean Engineering |
institution |
Open Polar |
collection |
Technical University of Denmark: DTU Orbit |
op_collection_id |
ftdtupubl |
language |
English |
topic |
Nonlinear wave mechanics Directional energy transfers wing waves OCEANWAVE3D /dk/atira/pure/sustainabledevelopmentgoals/affordable_and_clean_energy SDG 7 - Affordable and Clean Energy |
spellingShingle |
Nonlinear wave mechanics Directional energy transfers wing waves OCEANWAVE3D /dk/atira/pure/sustainabledevelopmentgoals/affordable_and_clean_energy SDG 7 - Affordable and Clean Energy Barratt, Dylan Bingham, Harry B. Adcock, Thomas A. A. Nonlinear Evolution of a Steep, Focusing Wave Group in Deep Water Simulated with OceanWave3D |
topic_facet |
Nonlinear wave mechanics Directional energy transfers wing waves OCEANWAVE3D /dk/atira/pure/sustainabledevelopmentgoals/affordable_and_clean_energy SDG 7 - Affordable and Clean Energy |
description |
Steep, focusing waves can experience fast and local nonlinear evolution of the spectrum due to wave-wave interactions resulting in energy transfer to both higher and lower wavenumber components. The shape and kinematics of a steep wave may, thus, differ substantially from the predictions of linear theory. We have investigated the role of nonlinear interactions on group-shape for a steep, narrow-banded, directionally-spread wave group focusing in deep water using the fully-nonlinear potential flow solver, OceanWave3D. Exact second-order correction of the initial conditions has been implemented together with a novel third-order approximate correction based on a Stokes-type formulation for surface elevation combined with a scaling-argument for the third-order velocity potential. Four-phase separation reveals that the third-order scheme provides a good estimate for the third-order superharmonics. A quantitative assessment of numerical error has also been performed for the spatial and temporal discretization, including energy conservation, a reversibility check and validation against previous simulations performed with a higher-order spectral (HOS) code. The initially narrow-banded amplitude spectrum exhibits the formation of sidelobes at angles of approximately ±35° to the spectral peak during the simulated extreme wave event, occurring in approximately 10 wave periods, with a preferential energy transfer to high-wavenumber components. The directional energy transfer is attributed to resonant third-order interactions with a discussion of the engineering implications. |
format |
Other Non-Article Part of Journal/Newspaper |
author |
Barratt, Dylan Bingham, Harry B. Adcock, Thomas A. A. |
author_facet |
Barratt, Dylan Bingham, Harry B. Adcock, Thomas A. A. |
author_sort |
Barratt, Dylan |
title |
Nonlinear Evolution of a Steep, Focusing Wave Group in Deep Water Simulated with OceanWave3D |
title_short |
Nonlinear Evolution of a Steep, Focusing Wave Group in Deep Water Simulated with OceanWave3D |
title_full |
Nonlinear Evolution of a Steep, Focusing Wave Group in Deep Water Simulated with OceanWave3D |
title_fullStr |
Nonlinear Evolution of a Steep, Focusing Wave Group in Deep Water Simulated with OceanWave3D |
title_full_unstemmed |
Nonlinear Evolution of a Steep, Focusing Wave Group in Deep Water Simulated with OceanWave3D |
title_sort |
nonlinear evolution of a steep, focusing wave group in deep water simulated with oceanwave3d |
publisher |
American Society of Mechanical Engineers |
publishDate |
2019 |
url |
https://orbit.dtu.dk/en/publications/6ca1a8b5-719a-47a0-af70-b5d1609b2bdc https://doi.org/10.1115/OMAE2019-95299 |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
Barratt , D , Bingham , H B & Adcock , T A A 2019 , Nonlinear Evolution of a Steep, Focusing Wave Group in Deep Water Simulated with OceanWave3D . in Proceedings of the ASME 2019 38th International Conference on Ocean, Offshore and Arctic Engineering . vol. Volume 7B: Ocean Engineering , OMAE2019-95299 , American Society of Mechanical Engineers , ASME 38th International Conference on Ocean, Offshore and Arctic Engineering , Glasgow , United Kingdom , 09/06/2019 . https://doi.org/10.1115/OMAE2019-95299 |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1115/OMAE2019-95299 |
container_title |
Volume 7B: Ocean Engineering |
_version_ |
1766296242800820224 |