Excitation of superharmonics by internal modes in non-uniformly stratified fluid

@inproceedings{Sutherland2016ExcitationOS,
  title={Excitation of superharmonics by internal modes in non-uniformly stratified fluid},
  author={B. R. Sutherland},
  year={2016}
}
Theory and numerical simulations show that the nonlinear self-interaction of internal modes in non-uniform stratification results in energy being transferred to superharmonic disturbances forced at twice the horizontal wavenumber and frequency of the parent mode. These disturbances are not in themselves a single mode, but a superposition of modes such that the disturbance amplitude is largest where the change in the background buoyancy frequency with depth is largest. Through weakly nonlinear… CONTINUE READING

Citations

Publications citing this paper.

References

Publications referenced by this paper.
Showing 1-10 of 23 references

Nonlinear generation

  • P.J.B.R. Sutherland DIAMESSIS, S. WUNSCH, I. DELWICHE, M. P. RICHTER
  • 2014
Highly Influential
3 Excerpts

Nonlinear generation of harmonics through the interaction of an internal wave beam with a model oceanic pycnocline

  • S. W UNSCH, I. D ELWICHE, M. P. R ICHTER
  • Dyn . Atmos . Oceans
  • 2014

Parametric subharmonic instability of internal waves : locally confined beams versus monochromatic wavetrains

  • H. H. K ARIMI, T. R. A KYLAS
  • J . Fluid Mech .
  • 2014

Experimental study of parametric subharmonic instability for internal plane waves

  • B. BOURGET, T. DAUXOIS, S. JOUBAUD, P. ODIER
  • J. Fluid Mech
  • 2013
1 Excerpt

Parametric subharmonic instability of the internal tide at 29 ◦ N

  • J. A. ACKINNON, M. H. A LFORD, O. S UN, R. P INKEL, Z. Z HAO, J. K LYMAK
  • 2013

Reflection of an internal gravity wave beam off a horizontal free - slip surface

  • Q. Z HOU, P. J. D IAMESSIS
  • Phys . Fluids
  • 2013

PSI of the internal tide on a β plane : flux divergence and near - inertial wave propagation

  • J. H AZEWINKEL, K. B. W INTERS
  • J . Phys . Oceanogr .
  • 2011

An experimental investigation of internal tide generation by two - dimensional topography

  • T. P EACOCK, P. E CHEVERRI, N. J. B ALMFORTH
  • J . Phys . Oceanogr .
  • 2008

Similar Papers

Loading similar papers…