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Measurement of the dispersion relation for random surface gravity waves

Taklo, Tore Magnus Arnesen; Trulsen, Karsten; Gramstad, Odin; Krogstad, Harald E; Jensen, Atle
Journal article, Peer reviewed
Accepted version
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URI
http://hdl.handle.net/11250/2483090
Date
2015
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  • Institutt for matematiske fag [1769]
  • Publikasjoner fra CRIStin - NTNU [26648]
Original version
Journal of Fluid Mechanics. 2015, 766 326-336.   10.1017/jfm.2015.25
Abstract
We report laboratory experiments and numerical simulations of the Zakharov equation, designed to have sufficient resolution in space and time to measure the dispersion relation for random surface gravity waves. The experiments and simulations are carried out for a JONSWAP spectrum and Gaussian spectra of various bandwidths on deep water. It is found that the measured dispersion relation deviates from the linear dispersion relation above the spectral peak when the bandwidth is sufficiently narrow.
Publisher
Cambridge University Press (CUP)
Journal
Journal of Fluid Mechanics

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