Journal article

Observation of turbulence and intermittency in wave-induced oscillatory flows

Alberto Alberello, Miguel Onorato, Federico Frascoli, Alessandro Toffoli

WAVE MOTION | ELSEVIER | Published : 2019

Abstract

The dynamic and thermal regimes of the climate are regulated by an exchange of energy and momentum between the atmosphere and the ocean. The role exerted by surface waves on this interchange is particularly enigmatic. Waves induce turbulence in the upper ocean by breaking and through Langmuir circulations. However, there is evidence that the wave oscillatory flow can be turbulent and directly inject mixing into subsurface layers. The existence, extent and properties of this non-breaking, wave-induced turbulent flow still remain uncertain. Here we present measurements of the velocity field of oscillatory flows, which are induced by mechanically generated random wave fields in a large scale ex..

View full abstract

Grants

Awarded by E.U. 7th Framework Programme through the Integrated Infrastructure Initiative HYDRALAB IV


Awarded by Progetto di Ricerca d'Ateneo


Awarded by "Departments of Excellence 2018-2022" Grant - Italian Ministry of Education, University and Research (MIUR)


Funding Acknowledgements

Experiments were funded by the E.U. 7th Framework Programme through the Integrated Infrastructure Initiative HYDRALAB IV (Contract No. 022441). MO received support from Progetto di Ricerca d'Ateneo CST0160004 and the "Departments of Excellence 2018-2022" Grant awarded by the Italian Ministry of Education, University and Research (MIUR, L.232/2016). AA and AT acknowledge support from the Air-Sea-Ice Lab Project. MO is grateful to B. Giulinico for discussions.