Experimental and numerical investigation of the slowly varying wave exciting drift forces on a restrained body in bi-chromatic waves

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dc.contributor.author Fonseca, N en
dc.contributor.author Pessoa, J en
dc.contributor.author Mavrakos, S en
dc.contributor.author Le Boulluec, M en
dc.date.accessioned 2014-03-01T02:01:59Z
dc.date.available 2014-03-01T02:01:59Z
dc.date.issued 2011 en
dc.identifier.issn 00298018 en
dc.identifier.uri http://hdl.handle.net/123456789/29284
dc.subject Bi-chromatic waves en
dc.subject Difference frequency forces en
dc.subject Experimental work en
dc.subject Potential flow methods en
dc.subject Second order forces en
dc.subject Slowly varying forces en
dc.subject Water depth effects en
dc.subject Wave exciting forces en
dc.subject.other Bi-chromatic waves en
dc.subject.other Difference frequency en
dc.subject.other Experimental work en
dc.subject.other Second orders en
dc.subject.other Slowly varying forces en
dc.subject.other Water depth effects en
dc.subject.other Wave exciting forces en
dc.subject.other Mooring en
dc.subject.other Numerical methods en
dc.subject.other drift behavior en
dc.subject.other experimental study en
dc.subject.other geometry en
dc.subject.other Green function en
dc.subject.other shallow water en
dc.subject.other testing method en
dc.subject.other water depth en
dc.subject.other water flow en
dc.subject.other water wave en
dc.title Experimental and numerical investigation of the slowly varying wave exciting drift forces on a restrained body in bi-chromatic waves en
heal.type journalArticle en
heal.identifier.primary 10.1016/j.oceaneng.2011.09.017 en
heal.identifier.secondary http://dx.doi.org/10.1016/j.oceaneng.2011.09.017 en
heal.publicationDate 2011 en
heal.abstract The paper presents an experimental and numerical investigation of the first order and slowly varying wave exciting forces on a body of simple geometry which is restrained from moving. Both monochromatic waves and three sets of bi-chromatic waves corresponding to three difference frequencies were tested. The depth effects on the second order forces are assessed by repeating the wave conditions for deep water, intermediate water depth and shallow water. The wave exciting mean drift forces and second order slowly varying forces were successfully measured and identified. However, since the magnitude of these forces is small compared to the global forces measured, there is some dispersion in the second order results. The experimental data is compared with three state of the art numerical methods which are able to compute the first and second order wave exciting forces. Two of the methods use Greens function panel methods (Wamit and HydroStar) and the third is based on an analytical solution (Diffrac-R). All methods compute the full second order solution, including the effects related to the quadratic interactions of first order quantities and to the second order diffraction potentials. © 2011 Elsevier Ltd. All rights reserved. en
heal.journalName Ocean Engineering en
dc.identifier.doi 10.1016/j.oceaneng.2011.09.017 en
dc.identifier.volume 38 en
dc.identifier.issue 17-18 en
dc.identifier.spage 2000 en
dc.identifier.epage 2014 en

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