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Wave-particle interaction in the Faraday waves.

N Francois1, H Xia2, H Punzmann2

  • 1Research School of Physics and Engineering, The Australian National University, ACT 2601, Canberra, Australia. Nicolas.Francois@anu.edu.au.

The European Physical Journal. E, Soft Matter
|October 1, 2015
PubMed
Summary
This summary is machine-generated.

Wave motion in disordered Faraday waves is analyzed using oscillons. Their Brownian-type dispersion reveals a direct link to fluid particle turbulence, explaining spectral broadening.

Keywords:
Topical Issue: Multi-scale phenomena in complex flows and flowing matter

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Area of Science:

  • Fluid dynamics
  • Nonlinear dynamics
  • Wave phenomena

Background:

  • Faraday waves exhibit complex behaviors, including disordered states.
  • Oscillons, or quasi-particles, represent collective fluid motion in these waves.
  • Previous studies linked fluid particle motion to 2D turbulence but lacked oscillon descriptions.

Purpose of the Study:

  • To analyze wave motion in disordered Faraday waves using oscillons.
  • To compare oscillon motion with fluid particle motion.
  • To investigate the relationship between oscillon velocity and fluid turbulence.

Main Methods:

  • Particle tracking tools were used to measure oscillon motion.
  • Oscillon motion was compared with the motion of floating fluid particles.
  • Root-mean-square (r.m.s.) velocities of oscillons and fluid particles were calculated.

Main Results:

  • Both oscillons and fluid particles exhibit Brownian-type dispersion.
  • Oscillon r.m.s. velocity is directly related to fluid particle turbulent r.m.s. velocity.
  • Measured oscillon velocity explains the broadening of surface elevation frequency spectra.

Conclusions:

  • Two-dimensional turbulence drives oscillon randomization and spectral broadening.
  • The coupling of wave motion and hydrodynamic turbulence is demonstrated.
  • This coupling offers new ways to predict fluid transport from wave spectra.