A series of measurements in a flume with a particle-tracking system in three dimensions applied to breaking waves, is used to analyse the structure of turbulence with a full set of variables that usually are available only in numerical simulations. After extracting turbulence, in addition to the standard analysis aiming to quantify the fluxes, i.e., the time-average and the phase-average levels of turbulence and vorticity (details are given in two former papers), a more in-depth description of the structure of turbulence Reynolds stress tensor is given, focussing on the invariants evolution in time and in the vertical. A relation between the components of the Reynolds stress tensor and of the dissipation tensor is depicted. This relation is finalised to possible models of turbulence in breaking waves.

Invariants of turbulence Reynolds stress and of dissipation tensors in regular breaking waves / Longo, Sandro Giovanni; Maria, Clavero; Chiapponi, Luca; Losada, Miguel A.. - In: WATER. - ISSN 2073-4441. - 9:11(2017), pp. 1-12. [10.3390/w9110893]

Invariants of turbulence Reynolds stress and of dissipation tensors in regular breaking waves

LONGO, Sandro Giovanni
;
CHIAPPONI, Luca;
2017

Abstract

A series of measurements in a flume with a particle-tracking system in three dimensions applied to breaking waves, is used to analyse the structure of turbulence with a full set of variables that usually are available only in numerical simulations. After extracting turbulence, in addition to the standard analysis aiming to quantify the fluxes, i.e., the time-average and the phase-average levels of turbulence and vorticity (details are given in two former papers), a more in-depth description of the structure of turbulence Reynolds stress tensor is given, focussing on the invariants evolution in time and in the vertical. A relation between the components of the Reynolds stress tensor and of the dissipation tensor is depicted. This relation is finalised to possible models of turbulence in breaking waves.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11381/2835191
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