A direct wave model based on the one-dimensional nonlinear equations for potential waves is used for simulation of wave field development under the action of energy input, dissipation, and nonlinear wave-wave interaction. The equations are written in conformal surface-fitted nonstationary coordinate system. New schemes for calculating the input and dissipation of wave energy are implemented. The wind input is calculated on the basis of the parameterization developed through the coupled modeling of waves and turbulent boundary layer. The wave dissipation algorithm, introduced to prevent wave breaking instability, is based on highly selective smoothing of the wave surface and surface potential. The integration is performed in Fourier domain with the number of modes M = 2048, broad enough to reproduce the energy downshifting. As the initial conditions, the wave field is assigned as train of Stokes waves with steepness ak = 0.15 at nondimensional wavenumber k = 512. Under the action of nonlinearity and energy input the spectrum starts to grow. This growth is followed by the downshifting. The total time of integration is equal to 7203 initial wave periods. During this time the energy increased by 1111 times. Peak of the spectrum gradually shifts from wavenumber nondimensional k = 512 down to k = 10. Significant wave height increases 33 times, while the peak period increases 51 times. Rates of the peak downshift and wave energy evolution are in good agreement with the JONSWAP formulation.
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September 2014
Research Article|
September 29 2014
Simulation of one-dimensional evolution of wind waves in a deep water
Dmitry Chalikov;
Dmitry Chalikov
a)
1
Swinburne University of Technology
, Victoria 3122, Australia
2
P.P. Shirshov Institute of Oceanology
, Centre for Ocean Engineering, Science and Technology, 30, 1st Lane, V. I. Saint-Petersburg 199053, Russia
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Alexander V. Babanin
Alexander V. Babanin
1
Swinburne University of Technology
, Victoria 3122, Australia
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a)
Author to whom correspondence should be addressed. Electronic mail: [email protected]. Telephone: +7 911 023 6644. Fax: +7 812 328 5759.
Physics of Fluids 26, 096607 (2014)
Article history
Received:
April 04 2014
Accepted:
September 06 2014
Citation
Dmitry Chalikov, Alexander V. Babanin; Simulation of one-dimensional evolution of wind waves in a deep water. Physics of Fluids 1 September 2014; 26 (9): 096607. https://doi.org/10.1063/1.4896378
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