The Interaction of Waves and Turbulence in Water.
CALIFORNIA UNIV BERKELEY HYDRAULIC ENGINEERING LAB
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The report investigates a system in which water waves are generated and propagated in a turbulent flow field. Growth of wind wave spectra and decay of monochromatic waves are considered. For monochromatic waves the turbulence in the water can greatly increase the rate of wave energy dissipation and that the data can be fitted by an equation with an eddy viscosity term proportional to the wave height, the phase speed of the waves, and the intensity of the larger scale turbulence. Growth of wind waves on turbulent water is faster than in still water however, maximum wave height in turbulent water is always lower than in still water. Wave energy spectra at the longer fetches in turbulent water show more wave energy at low frequency and less at high frequency than those for still water. Turbulence in water alters the rate of transfer of energy from the wind to the waves, the maximum height allowed and the distribution of wave energy among the various frequencies. Author
- Physical and Dynamic Oceanography
- Fluid Mechanics