Modulation Instability of Hydro-Elastic Waves Blown by a Wind with a Uniform Vertical Profile
Article
Article Title | Modulation Instability of Hydro-Elastic Waves Blown by a Wind with a Uniform Vertical Profile |
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ERA Journal ID | 212518 |
Article Category | Article |
Authors | Boral, Susam (Author), Sahoo, Trilochan (Author) and Stepanyants, Yury (Author) |
Journal Title | Fluids |
Journal Citation | 6 (12), pp. 1-18 |
Article Number | 458 |
Number of Pages | 18 |
Year | 2021 |
Publisher | MDPI AG |
Place of Publication | Switzerland |
ISSN | 2311-5521 |
Digital Object Identifier (DOI) | https://doi.org/10.3390/fluids6120458 |
Web Address (URL) | https://www.mdpi.com/2311-5521/6/12/458 |
Abstract | An interesting physical phenomenon was recently observed when a fresh-water basin is covered by a thin ice film that has properties similar to the property of a rubber membrane. Surface waves can be generated under the action of wind on the air–water interface that contains an ice film. The modulation property of hydro-elastic waves (HEWs) in deep water covered by thin ice film blown by the wind with a uniform vertical profile is studied here in terms of the airflow velocity versus wavenumber. The modulation instability of HEWs is studied through the analysis of coefficients of the nonlinear Schrödinger (NLS) equation with the help of the Lighthill criterion. The NLS equation is derived using the multiple scale method in the presence of airflow. It is demonstrated that the potentially unstable hydro-elastic waves with negative energy appear for relatively small wind speeds, whereas the Kelvin–Helmholtz instability arises when the wind speed becomes fairly strong. Estimates of parameters of modulated waves for the typical conditions are given. |
Keywords | wind wave; ice cover; vortex sheet; negative energy wave; modulation instability |
ANZSRC Field of Research 2020 | 510301. Acoustics and acoustical devices; waves |
490109. Theoretical and applied mechanics | |
Byline Affiliations | Indian Institute of Technology, India |
School of Sciences | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q6yxw/modulation-instability-of-hydro-elastic-waves-blown-by-a-wind-with-a-uniform-vertical-profile
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2021 Boral, Sahoo, Stepanyants - Fluids.pdf | ||
License: CC BY 4.0 | ||
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