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Publication - Dr Tamara Grava

    Numerical study of the Petviashvili equation and dispersive shock waves


    Grava, T, Klein, C & Pitton, G, 2018, ‘Numerical study of the Petviashvili equation and dispersive shock waves’. Proceedings of the Royal Society A: Mathematical and Physical Sciences., pp. 20170458


    A detailed numerical study of the long time behaviour of dispersive shock waves in solutions to the Kadomtsev–Petviashvili (KP) I equation is presented. It is shown that modulated lump solutions emerge from the dispersive shock waves. For the description of dispersive shock waves, Whitham modulation equations for KP are obtained. It is shown that the modulation equations near the soliton line are hyperbolic for the KPII equation while they are elliptic for the KPI equation leading to a focusing effect and the formation of lumps. Such a behaviour is similar to the appearance of breathers for the focusing nonlinear Schrödinger equation in the semiclassical limit.

    Full details in the University publications repository