Numerical and experimental investigation of extreme events in JONSWAP seas

Guillaume Ducrozet, Alessandro Toffoli, Amin Chabchoub

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

Abstract

The dynamics of nonlinear water waves and extreme waves in particular can be accurately investigated numerically using a numerical wave tank (NWT), implemented by the higher-order spectral method (HOS). In fact, a number of laboratory studies validated the proposed numerical approach, while a very high validation accuracy is reached. We present a numerical study based on a HOS-NWT scheme in the investigation of the one-dimensional propagation of extreme events in JONSWAP seas, having their origin from exact breather solutions of the nonlinear Schrödinger equation. Indeed, breathers are known to model extreme waves, when the wave field's spectrum is assumed to be narrow-banded. On the other hand recent experimental studies confirmed that these localized structures can also evolve, when wind or significant perturbations are at play. We will investigate the validity of the proposed numerical scheme by comparing the simulation results to laboratory data. The dynamics of both wave fields show indeed a very good agreement.

Original languageEnglish
Title of host publicationProceedings of the 28th International Ocean and Polar Engineering Conference, ISOPE 2018
PublisherINTERNATIONAL SOCIETY OF OFFSHORE AND POLAR ENGINEERS
Pages392-396
Number of pages5
Volume2018-June
ISBN (Print)9781880653876
Publication statusPublished - 1 Jan 2018
MoE publication typeA4 Article in a conference publication
EventInternational Ocean and Polar Engineering Conference - Sapporo, Japan
Duration: 10 Jun 201815 Jun 2018
Conference number: 28

Conference

ConferenceInternational Ocean and Polar Engineering Conference
Abbreviated titleISOPE
CountryJapan
CitySapporo
Period10/06/201815/06/2018

Keywords

  • Breathers
  • HOS-NWT
  • Rogue waves

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