Drifting rogue packets
Modulation instability (MI) is one possible mechanism to explain the formation of extreme waves in uni-directional and narrow-banded seas. It can be triggered, when side-bands around the main frequency are excited and subsequently follow an exponential growth. In physical domain this dynamics transl...
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American Society of Mechanical Engineers
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ftanucanberra:oai:openresearch-repository.anu.edu.au:1885/205818 2024-01-14T10:02:50+01:00 Drifting rogue packets Chabchoub, Amin Hoffmann, Norbert P. Akhmediev, Nail Waseda, Takuji Madrid, Spain application/pdf http://hdl.handle.net/1885/205818 https://doi.org/10.1115/OMAE2018-77904 https://openresearch-repository.anu.edu.au/bitstream/1885/205818/3/01_Chabchoub_Drifting_rogue_packets_2018.pdf.jpg en_AU eng American Society of Mechanical Engineers http://purl.org/au-research/grants/arc/DP150102057 ASME 2018 37th International Conference on Ocean, Offshore and Arctic Engineering, OMAE 2018 978-079185122-7 http://hdl.handle.net/1885/205818 doi:10.1115/OMAE2018-77904 https://openresearch-repository.anu.edu.au/bitstream/1885/205818/3/01_Chabchoub_Drifting_rogue_packets_2018.pdf.jpg © 2018 ASME Proceedings of the International Conference on Offshore Mechanics and Arctic Engineering - OMAE Dynamics (Mechanics) Modeling Seas Water Water waves Wave packets Waves Conference paper ftanucanberra https://doi.org/10.1115/OMAE2018-77904 2023-12-15T09:34:22Z Modulation instability (MI) is one possible mechanism to explain the formation of extreme waves in uni-directional and narrow-banded seas. It can be triggered, when side-bands around the main frequency are excited and subsequently follow an exponential growth. In physical domain this dynamics translates to periodic pulsations of wave groups that can reach heights up to three times the initial amplitude of the wave train. It is well-known that these periodic wave groups propagate with approximately half the waves phase speed in deep-water. We report an experimental study on modulationally unstable wave groups that propagate with a velocity that is higher than the group velocity since the modulation frequency is complex. It is shown that when this additional velocity to the wave groups is small a good agreement with exact nonlinear Schrödinger (NLS) models, that describe the nonlinear stage of MI, is reached. Otherwise a significant deviation is observed that could be compensated when increasing accuracy of the water wave modeling beyond NLS. N.H. acknowledges support of the Deutsche Forschungsgemeinschaft grant HO 3852/10. N.A. acknowledges the support of the Australian Research Council (Discovery Project DP150102057) and support from the Volkswagen Stiftung. Conference Object Arctic Australian National University: ANU Digital Collections Volume 3: Structures, Safety, and Reliability |
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Open Polar |
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Australian National University: ANU Digital Collections |
op_collection_id |
ftanucanberra |
language |
English |
topic |
Dynamics (Mechanics) Modeling Seas Water Water waves Wave packets Waves |
spellingShingle |
Dynamics (Mechanics) Modeling Seas Water Water waves Wave packets Waves Chabchoub, Amin Hoffmann, Norbert P. Akhmediev, Nail Waseda, Takuji Drifting rogue packets |
topic_facet |
Dynamics (Mechanics) Modeling Seas Water Water waves Wave packets Waves |
description |
Modulation instability (MI) is one possible mechanism to explain the formation of extreme waves in uni-directional and narrow-banded seas. It can be triggered, when side-bands around the main frequency are excited and subsequently follow an exponential growth. In physical domain this dynamics translates to periodic pulsations of wave groups that can reach heights up to three times the initial amplitude of the wave train. It is well-known that these periodic wave groups propagate with approximately half the waves phase speed in deep-water. We report an experimental study on modulationally unstable wave groups that propagate with a velocity that is higher than the group velocity since the modulation frequency is complex. It is shown that when this additional velocity to the wave groups is small a good agreement with exact nonlinear Schrödinger (NLS) models, that describe the nonlinear stage of MI, is reached. Otherwise a significant deviation is observed that could be compensated when increasing accuracy of the water wave modeling beyond NLS. N.H. acknowledges support of the Deutsche Forschungsgemeinschaft grant HO 3852/10. N.A. acknowledges the support of the Australian Research Council (Discovery Project DP150102057) and support from the Volkswagen Stiftung. |
format |
Conference Object |
author |
Chabchoub, Amin Hoffmann, Norbert P. Akhmediev, Nail Waseda, Takuji |
author_facet |
Chabchoub, Amin Hoffmann, Norbert P. Akhmediev, Nail Waseda, Takuji |
author_sort |
Chabchoub, Amin |
title |
Drifting rogue packets |
title_short |
Drifting rogue packets |
title_full |
Drifting rogue packets |
title_fullStr |
Drifting rogue packets |
title_full_unstemmed |
Drifting rogue packets |
title_sort |
drifting rogue packets |
publisher |
American Society of Mechanical Engineers |
url |
http://hdl.handle.net/1885/205818 https://doi.org/10.1115/OMAE2018-77904 https://openresearch-repository.anu.edu.au/bitstream/1885/205818/3/01_Chabchoub_Drifting_rogue_packets_2018.pdf.jpg |
op_coverage |
Madrid, Spain |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
Proceedings of the International Conference on Offshore Mechanics and Arctic Engineering - OMAE |
op_relation |
http://purl.org/au-research/grants/arc/DP150102057 ASME 2018 37th International Conference on Ocean, Offshore and Arctic Engineering, OMAE 2018 978-079185122-7 http://hdl.handle.net/1885/205818 doi:10.1115/OMAE2018-77904 https://openresearch-repository.anu.edu.au/bitstream/1885/205818/3/01_Chabchoub_Drifting_rogue_packets_2018.pdf.jpg |
op_rights |
© 2018 ASME |
op_doi |
https://doi.org/10.1115/OMAE2018-77904 |
container_title |
Volume 3: Structures, Safety, and Reliability |
_version_ |
1788057970180882432 |