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Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.3/76449
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- Statistical properties of mechanically generated surface gravity waves: a laboratory experiment in a three-dimensional wave basin
- Onorato, M.; Cavaleri, L.; Fouques, S.; Gramstad, O.; Janssen, P. A. E. M.; Monbaliu, J.; Osborne, A. R.; Pakozdi, C.; Serio, M.; Stansberg, C. T.; Toffoli, A.; Trulsen, K.
- A wave basin experiment has been performed in the MARINTEK laboratories, in one of the largest existing three-dimensional wave tanks in the world. The aim of the experiment is to investigate the effects of directional energy distribution on the statistical properties of surface gravity waves. Different degrees of directionality have been considered, starting from long-crested waves up to directional distributions with a spread of ±30° at the spectral peak. Particular attention is given to the tails of the distribution function of the surface elevation, wave heights and wave crests. Comparison with a simplified model based on second-order theory is reported. The results show that for long-crested, steep and narrow-banded waves, the second-order theory underestimates the probability of occurrence of large waves. As directional effects are included, the departure from second-order theory becomes less accentuated and the surface elevation is characterized by weak deviations from Gaussian statistics.
- Publication type
- Journal article
- Journal of Fluid Mechanics, Vol. 627 (May 2009), pp. 235-257
- Publication year
- FOR Code(s)
- 0102 Applied Mathematics; 0915 Interdisciplinary Engineering
- Directional effects; Gravitational effects; Surface elevations; Surface gravity waves; Wave basins; Wave crests; Wave heights
- Cambridge University Press
- Publisher URL
- Copyright © 2009 Cambridge University Press. Published version of the paper reproduced here with the kind permission of the publisher.
- Full text
- Peer reviewed