TIME-DEPENDENT DEPTH-INTEGRATED TURBULENCE MODELING OF BREAKING WAVES

Kazuo Nadaoka, Osafumi Ono

Abstract


A breaking wave model is presented to simulate non-equilibrium evolution of turbulence with a time-dependent depth-integrated equation of turbulence intensity, which is to be coupled with nonlinear wave. As the crucial part of the modeling, a method to estimate the production rate of turbulent kinetic energy is developed. This method is based on the experimental observation of the pseudo-periodic generation of large-scale eddies near the wave crest of turbulent bore. As a demonstration to show the performance of the present model, numerical examples are given for regular and irregular waves on a slope and regular waves on a double step, indicating that this model can give favorable features of evolution of regular and irregular breaking waves and the production and diffusion of turbulent kinetic energy.

Keywords


breaking waves; turbulence; turbulence modeling

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