A coupled-mode model for the refraction-diffraction of linear waves over steep three-dimensional bathymetry

dc.contributor.author	Μπελιμπασάκης, Κωνσταντίνος Α.	el
dc.contributor.author	Αθανασούλης, Γεράσιμος Α.	el
dc.contributor.author	Γεροστάθης, Θεόδωρος	el
dc.date.accessioned	2015-06-02T21:03:21Z
dc.date.available	2015-06-02T21:03:21Z
dc.date.issued	2015-06-03
dc.identifier.uri	http://hdl.handle.net/11400/14911
dc.rights	Αναφορά Δημιουργού-Μη Εμπορική Χρήση-Όχι Παράγωγα Έργα 3.0 Ηνωμένες Πολιτείες	*
dc.rights.uri	http://creativecommons.org/licenses/by-nc-nd/3.0/us/	*
dc.source	http://www.scopus.com/record/display.url?origin=recordpage&eid=2-s2.0-0035738693&citeCnt=59&noHighlight=false&sort=plf-f&src=s&sid=7F04C384A08FCCC9964A7BA0BE6ED47D.ZmAySxCHIBxxTXbnsoe5w%3a3670&sot=autdocs&sdt=autdocs&sl=17&s=AU-ID%286506377132%29&relpos=21	en
dc.subject	Βαθυμετρία
dc.subject	Συνοριακές συνθήκες
dc.subject	Οριακά στρώματα
dc.subject	Περίθλαση
dc.subject	Μαθηματικά μοντέλα
dc.subject	Διάθλαση
dc.subject	Bathymetry
dc.subject	Boundary conditions
dc.subject	Boundary layers
dc.subject	Diffraction
dc.subject	Mathematical models
dc.subject	Refraction
dc.title	A coupled-mode model for the refraction-diffraction of linear waves over steep three-dimensional bathymetry	en
heal.type	journalArticle
heal.classification	Ναυτική τέχνη και επιστήμη
heal.classification	Ναυτική μηχανολογία
heal.classification	Naval art and science
heal.classification	Marine engineering
heal.classificationURI	N/A-Ναυτική τέχνη και επιστήμη
heal.classificationURI	N/A-Ναυτική μηχανολογία
heal.classificationURI	http://id.loc.gov/authorities/subjects/sh85090357
heal.classificationURI	http://id.loc.gov/authorities/subjects/sh85081157
heal.keywordURI	http://skos.um.es/unescothes/C00351
heal.keywordURI	http://id.loc.gov/authorities/subjects/sh85037928
heal.keywordURI	http://id.loc.gov/authorities/subjects/sh85112257
heal.identifier.secondary	DOI: 10.1016/S0141-1187(02)00004-4
heal.language	en
heal.access	campus
heal.recordProvider	Τεχνολογικό Εκπαιδευτικό Ίδρυμα Αθήνας. Σχολή Τεχνολογικών Εφαρμογών. Τμήμα Ναυπηγών Μηχανικών Τ.Ε.	el
heal.publicationDate	2001-12
heal.bibliographicCitation	Belibassakis, K.A., Gerostathis, T.P., and Athanassoulis, G.A. (2001) A coupled-mode model for the refraction-diffraction of linear waves over steep three-dimensional bathymetry. Applied Ocean Research. [Online] 23 (6), pp.319-336. Available from: http://www.scopus.com [Accessed 02/06/2015]	en
heal.abstract	A consistent coupled-mode model recently developed by Athanassoulis and Belibassakis [1], is generalized in 2 + 1 dimensions and applied to the diffraction of small-amplitude water waves from localized three-dimensional scatterers lying over a parallel-contour bathymetry. The wave field is decomposed into an incident field, carrying out the effects of the background bathymetry, and a diffraction field, with forcing restricted on the surface of the localized scatterer(s). The vertical distribution of the wave potential is represented by a uniformly convergent local-mode series containing, except of the ususal propagating and evanescent modes, an additional mode, accounting for the sloping bottom boundary condition. By applying a variational principle, the problem is reduced to a coupled-mode system of differential equations in the horizontal space. To treat the unbounded domain, the Berenger perfectly matched layer model is optimized and used as an absorbing boundary condition. Computed results are compared with other simpler models and verified against experimental data. The inclusion of the sloping-bottom mode in the representation substantially accelerates its convergence, and thus, a few models are enough to obtain accurately the wave potential and velocity up to and including the boundaries, even in steep bathymetry regions. The present method provides high-quality information concerning the pressure and the tangential velocity at the bottom, useful for the study of oscillating bottom boundary layer, sea-bed movement and sediment transport studies.	en
heal.publisher	Elsevier	en
heal.journalName	Applied Ocean Research	en
heal.journalType	peer-reviewed
heal.fullTextAvailability	true