Edge-wave-driven durable variations in the thickness of the surfactant film and concentration of surface floats |
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| Affiliation: | 1. Nizhny Novgorod State Technical University n.a. R.E. Alekseev, Minin St. 24, 603950 Nizhny Novgorod, Russia;2. National Research University Higher School of Economics, 25/12 Bolʼshaya Pecherskaya St., 603155 Nizhny Novgorod, Russia;3. Institute of Cybernetics at Tallinn University of Technology, Akadeemia tee 21, 12618 Tallinn, Estonia;4. Estonian Academy of Sciences, Kohtu 6, 10130 Tallinn, Estonia |
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| Abstract: | By employing a simple model for small-scale linear edge waves propagating along a homogeneous sloping beach, we demonstrate that certain combinations of linear wave components may lead to durable changes in the thickness of the surfactant film, equivalently, in the concentration of various substances (debris, litter) floating on the water surface. Such changes are caused by high-amplitude transient elevations that resemble rogue waves and occur during dispersive focusing of wave fields with a continuous spectrum. This process can be treated as an intrinsic mechanism of production of patches in the surface layer of an otherwise homogeneous coastal environment impacted by linear edge waves. |
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| Keywords: | Edge waves Surfactant film Patch formation Wave focusing |
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