A model equation for wavepacket solitary waves arising from capillary-gravity flows

Benjamin Akers, Paul A. Milewski

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A model equation governing the primitive dynamics of wave packets near an extremum of the linear dispersion relation at finite wavenumber is derived. In two spatial dimensions, we include the effects of weak variation of the wave in the direction transverse to the direction of propagation. The resulting equation is contrasted with the Kadomtsev-Petviashvilli and Nonlinear Schrödinger (NLS) equations. The model is derived as an approximation to the equations for deep water gravity-capillary waves, but has wider applications. Both line solitary waves and solitary waves which decay in both the transverse and propagating directions - lump solitary waves - are computed. The stability of these waves is investigated and their dynamics are studied via numerical time evolution of the equation.

Original languageEnglish (US)
Pages (from-to)249-274
Number of pages26
JournalStudies in Applied Mathematics
Issue number3
StatePublished - Apr 2009

All Science Journal Classification (ASJC) codes

  • Applied Mathematics

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