Dynamics of a Wave Packet on the Surface of an Inhomogeneously Vortical Fluid (Lagrangian Description)
- Авторлар: Abrashkin A.1, Pelinovsky E.2,3
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Мекемелер:
- National Research University Higher School of Economics
- Institute of Applied Physics
- Nizhny Novgorod State Technical University
- Шығарылым: Том 54, № 1 (2018)
- Беттер: 101-105
- Бөлім: Article
- URL: https://journals.rcsi.science/0001-4338/article/view/148533
- DOI: https://doi.org/10.1134/S0001433818010036
- ID: 148533
Дәйексөз келтіру
Аннотация
A nonlinear Schrödinger equation (NSE) describing packets of weakly nonlinear waves in an inhomogeneously vortical infinitely deep fluid has been derived. The vorticity is assumed to be an arbitrary function of Lagrangian coordinates and quadratic in the small parameter proportional to the wave steepness. It is shown that the modulational instability criteria for the weakly vortical waves and potential Stokes waves on deep water coincide. The effect of vorticity manifests itself in a shift of the wavenumber of high-frequency filling. A special case of Gerstner waves with a zero coefficient at the nonlinear term in the NSE is noted.
Негізгі сөздер
Авторлар туралы
A. Abrashkin
National Research University Higher School of Economics
Email: pelinovsky@hydro.appl.sci-nnov.ru
Ресей, Nizhny Novgorod, 603155
E. Pelinovsky
Institute of Applied Physics; Nizhny Novgorod State Technical University
Хат алмасуға жауапты Автор.
Email: pelinovsky@hydro.appl.sci-nnov.ru
Ресей, Nizhny Novgorod, 603950; Nizhny Novgorod, 603950