Large mode-2 internal solitary waves in three-layer flows

Alex Doak, Ricardo Barros, Paul Milewski

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4 Citations (SciVal)
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Abstract

In this paper, we investigate mode-2 solitary waves in a three-layer stratified flow model. Localised travelling wave solutions to both the fully nonlinear problem (Euler equations), and the three-layer Miyata–Choi–Camassa equations are found numerically and compared. Mode-2 solitary waves with speeds slower than the linear mode-1 long-wave speed are typically generalised solitary waves with infinite tails consisting of a resonant mode-1 periodic wave train. Herein, we evidence the existence of mode-2 embedded solitary waves, that is, we show that for specific values of the parameters, the amplitude of the oscillations in the tail are zero. For sufficiently thick middle layers, we also find branches of mode-2 solitary waves with speeds that extend beyond the mode-1 linear waves and are no longer embedded. In addition, we show how large amplitude embedded solitary waves are intimately linked to the conjugate states of the problem.
Original languageEnglish
Article number A42
JournalJournal of Fluid Mechanics
Volume953
Early online date16 Dec 2022
DOIs
Publication statusPublished - 25 Dec 2022

Bibliographical note

Publisher Copyright:
© 2022 Cambridge University Press. All rights reserved.

Keywords

  • bifurcation
  • solitary waves
  • stratified flows

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Applied Mathematics

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