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Regular version of the site

Article

Numerical simulations of modulated waves in a higher-order Dysthe equation

Water Waves (Springer). 2020. Vol. 2. No. 1. P. 59-77.
Slunyaev A., Pelinovsky E.

The nonlinear stage of the modulational (Benjamin–Feir) instability of unidirectional
deep-water surface gravity waves is simulated numerically by the fifth-order
nonlinear envelope equations. The conditions of steep and breaking waves are concerned.
The results are compared with the solution of the full potential Euler equations
and with the lower-order envelope models (the 3-order nonlinear Schrödinger
equation and the standard 4-order Dysthe equations). The generalized Dysthe model
is shown to exhibit the tendency to re-stabilization of steep waves with respect to
long perturbations.