Measurements of the kinetic energy of turbulence under spilling waves have been analysed using orthogonal wavelets. Data have been collected using 2-D laser Doppler velocimetry for pre-breaking regular waves, generated in a wave tank. The contribution of different scale vortices is computed, and also phase resolved. It is found that micro-vortices (2 mm <l<0.10 m for the tested case) and mid-size vortices (0.10 m<l<4.0 m for the tested case) are generally dominant, carrying more than 70% of the total turbulence energy under the wave crest. The phase resolved energy spectra are computed, which allows the computation of the transverse and of the longitudinal correlations.

Turbulence under spilling breakers using wavelets / Longo, Sandro Giovanni. - In: EXPERIMENTS IN FLUIDS. - ISSN 0723-4864. - 34:2(2003), pp. 181-191. [10.1007/s00348-002-0545-1]

Turbulence under spilling breakers using wavelets

LONGO, Sandro Giovanni
2003-01-01

Abstract

Measurements of the kinetic energy of turbulence under spilling waves have been analysed using orthogonal wavelets. Data have been collected using 2-D laser Doppler velocimetry for pre-breaking regular waves, generated in a wave tank. The contribution of different scale vortices is computed, and also phase resolved. It is found that micro-vortices (2 mm
Turbulence under spilling breakers using wavelets / Longo, Sandro Giovanni. - In: EXPERIMENTS IN FLUIDS. - ISSN 0723-4864. - 34:2(2003), pp. 181-191. [10.1007/s00348-002-0545-1]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11381/1455586
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