Direct numerical simulations of capillary wave turbulence

Luc Deike, Daniel Fuster, Michael Berhanu, Eric Falcon

Research output: Contribution to journalArticle

27 Scopus citations

Abstract

This work presents direct numerical simulations of capillary wave turbulence solving the full three-dimensional Navier-Stokes equations of a two-phase flow. When the interface is locally forced at large scales, a statistical stationary state appears after few forcing periods. Smaller wave scales are generated by nonlinear interactions, and the wave height spectrum is found to obey a power law in both wave number and frequency, in good agreement with weak turbulence theory. By estimation of the mean energy flux from the dissipated power, the Kolmogorov-Zakharov constant is evaluated and found to be compatible with the exact theoretical value. The time scale separation between linear, nonlinear interaction, and dissipative times is also observed. These numerical results confirm the validity of the weak turbulence approach to quantify out-of equilibrium wave statistics.

Original languageEnglish (US)
Article number234501
JournalPhysical review letters
Volume112
Issue number23
DOIs
StatePublished - Jun 9 2014

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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