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    Gray solitons on the surface of water
    (American Physical Society (APS), 2014-01-10) ; ; ; ;
    The dynamics of surface gravity water waves can be described by the self-defocusing nonlinear Schrödinger equation. Recent observations of black solitons on the surface of water confirmed its validity for finite, below critical depth. The black soliton is a limiting case of a family of gray soliton solutions with finite amplitude depressions. Here, we report observations of gray solitons in water waves, thus, complementing our previous observations of black solitons. © 2014 American Physical Society.
    Publicationtype: Journal Article
      32
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    Experiments on wind-perturbed rogue wave hydrodynamics using the Peregrine breather model
    (American Institute of Physics (AIP), 2013-10-10) ; ; ; ;
    Being considered as a prototype for description of oceanic rogue waves (RWs), the Peregrine breather solution of the nonlinear Schr\"odinger equation (NLS) has been recently observed and intensely investigated experimentally in particular within the context of water waves. Here, we report the experimental results showing the evolution of the Peregrine solution in the presence of wind forcing in the direction of wave propagation. The results show the persistence of the breather evolution dynamics even in the presence of strong wind and chaotic wave field generated by it. Furthermore, we have shown that characteristic spectrum of the Peregrine breather persists even at the highest values of the generated wind velocities thus making it a viable characteristic for prediction of rogue waves.
    Publicationtype: Journal Article
      110
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    Item type:Publication, Access status: with files ,
    Experimental observation of dark solitons on the surface of water
    (American Physical Society (APS), 2013-03-21) ; ; ; ;
    We present the first ever observation of dark solitons on the surface of water. It takes the form of an amplitude drop of the carrier wave which does not change shape in propagation. The shape and width of the soliton depend on the water depth, carrier frequency, and the amplitude of the background wave. The experimental data taken in a water tank show an excellent agreement with the theory. These results may improve our understanding of the nonlinear dynamics of water waves at finite depths. © 2013 American Physical Society.
    Publicationtype: Journal Article
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