Strongly nonlinear phenomena in extreme waves

Iafrati, Alessandro, De Vita, Francesco, Toffoli, Alessandro and Alberello, Alberto (2016) Strongly nonlinear phenomena in extreme waves. In: SNAME Transactions. Society of Naval Architects and Marine Engineers, USA, pp. 17-35. ISBN 9780939773176

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Abstract

In this paper the breaking of steep free surface waves is investigated by a two-fluid numerical approach. The study is focused at providing estimates of the energy dissipation and the variations to the spectrum associated to the breaking process. The simulations make available a highly refined description of the flow in both air and water which is also important for the estimates of load in severe conditions. Two different approaches are used to produce steep waves. A first approach exploits the classical Benjamin-Feir instability which generates extreme waves through the modulational instability process. In a second application a more realistic, narrow-banded, JONSWAP spectrum is used. Results are presented in terms of free surface dynamics and energy, separated in kinetic and potential components. The changes operated by the breaking occurrence on the spectrum are also discussed.

Item Type: Book Section
Uncontrolled Keywords: energy dissipation,modulational instability,navier-stokes equations,two phase flows solvers,wave breaking,ocean engineering ,/dk/atira/pure/subjectarea/asjc/2200/2212
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Depositing User: LivePure Connector
Date Deposited: 13 Nov 2021 01:55
Last Modified: 15 Nov 2021 01:46
URI: https://ueaeprints.uea.ac.uk/id/eprint/82098
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