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Type: Journal article
Title: Estimation of kinetic energy dissipation from breaking waves in the wave crest region
Author: Lee, J.
Monty, J.
Elsnab, J.
Toffoli, A.
Babanin, A.
Alberello, A.
Citation: Journal of Physical Oceanography, 2017; 47(5):1145-1150
Publisher: American Meteorological Society
Issue Date: 2017
ISSN: 0022-3670
Statement of
J. H. Lee, J. P.Monty, J. Elsnab, A. Toffoli, and A. V. Babanin, A. Alberello
Abstract: Wave-induced turbulence due to breaking in the absence of surface shear stresses is investigated experimentally. A high-fidelity particle image velocimetry (PIV) technique is used to measure the turbulence near the water surface, inside the wave crests. The spatial velocity vector fields of the breaking waves acquired from PIV provide accurate vertical velocity profiles near the air–water interface, as well as wavenumber velocity spectra beneath the breaking waves at different depths. These velocity spectra exhibit a Kolmogorov interval at high wavenumbers, indicating the presence of isotropic turbulence and permitting an estimation of energy dissipation rates. The depth dependence of dissipation rates of the breaking waves generated in the laboratory shows a scaling similar to that found in wind-forced breaking waves in the field. A phase dependence in the dissipation rates of turbulence kinetic energy is also observed, which should be considered to improve the accuracy of the estimated and modeled wave energy dissipation.
Rights: © 2017 American Meteorological Society
RMID: 0030094104
DOI: 10.1175/JPO-D-16-0273.1
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Appears in Collections:Mathematical Sciences publications

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