Article thumbnail

Existence and conditional energetic stability of solitary gravity-capillary water waves with constant vorticity

By M. D. Groves and Erik Wahlén

Abstract

We present an existence and stability theory for gravity-capillary solitary waves with constant vorticity on the surface of a body of water of finite depth. Exploiting a rotational version of the classical variational principle, we prove the existence of a minimizer of the wave energy H subject to the constraint I = 2 mu, where I is the wave momentum and 0 < mu << 1. Since H and I are both conserved quantities, a standard argument asserts the stability of the set D-mu of minimizers: solutions starting near D-mu remain close to D-mu in a suitably defined energy space over their interval of existence. In the applied mathematics literature solitary water waves of the present kind are described by solutions of a Korteweg-de Vries equation (for strong surface tension) or a nonlinear Schrodinger equation (for weak surface tension). We show that the waves detected by our variational method converge (after an appropriate rescaling) to solutions of the appropriate model equation as mu down arrow 0

Topics: Mathematics, water waves, solitary waves, vorticity, calculus of variations
Publisher: 'Cambridge University Press (CUP)'
Year: 2015
DOI identifier: 10.1017/S0308210515000116
OAI identifier: oai:lup.lub.lu.se:9ce6fc9c-51b7-4326-9b9d-1afcc260ee48
Download PDF:
Sorry, we are unable to provide the full text but you may find it at the following location(s):
  • http://dx.doi.org/10.1017/S030... (external link)
  • https://portal.research.lu.se/... (external link)
  • https://lup.lub.lu.se/record/7... (external link)
  • Suggested articles


    To submit an update or takedown request for this paper, please submit an Update/Correction/Removal Request.