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Focusing unidirectional wave groups on finite water depth with and without currents

Stagonas, D; Buldakov, E; Simons, RR; (2014) Focusing unidirectional wave groups on finite water depth with and without currents. In: Proceedings of 34th Conference on Coastal Engineering. International Conference on Coastal Engineering (ICCE): Seoul, South Korea. Green open access

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Abstract

Focused waves are often used in physical and numerical studies as a representative condition for extreme waves or as a mean to generate very steep and breaking waves at a desired location in space and time. A focused wave is in theory created when all the components in a transient wave group come in phase. In the past, linear wave theory and empirical iterative methodologies have been suggested in order to achieve the required phase and amplitude focusing. Nevertheless, their effectiveness decreases as the non-linearity of the wave group increases and thus the generation of very high focused waves was a challenging task. Here, an empirical iterative methodology is suggested which can focus waves of any height at a predetermined temporal and spatial location. The methodology has been successfully applied to wave groups travelling on still water but also on sheared currents and it has been implemented in both physical and numerical wave flumes. The results presented here refer to linear, weakly non-linear and strongly non-linear focused waves generated with a realistic target spectrum.

Type: Proceedings paper
Title: Focusing unidirectional wave groups on finite water depth with and without currents
Event: 34th International Conference on Coastal Engineering
Location: Seoul, South Korea
Dates: 15 June 2014 - 20 June 2014
Open access status: An open access version is available from UCL Discovery
DOI: 10.9753/icce.v34.waves.31
Publisher version: http://dx.doi.org/10.9753/icce.v34.waves.31
Language: English
Additional information: Copyright © The Authors 2014. This is an Open Access paper published under a Creative Commons licence.
Keywords: Focused waves, waves on currents, extreme waves
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Civil, Environ and Geomatic Eng
URI: https://discovery.ucl.ac.uk/id/eprint/1457403
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