A coupled-mode, phase-resolving model for the transformation of wave spectrum over steep 3D topography

dc.contributor.author	Γεροστάθης, Θεόδωρος	el
dc.contributor.author	Μπελιμπασάκης, Κωνσταντίνος Α.	el
dc.contributor.author	Αθανασούλης, Γεράσιμος Α.	el
dc.date.accessioned	2015-06-02T20:31:50Z
dc.date.available	2015-06-02T20:31:50Z
dc.date.issued	2015-06-02
dc.identifier.uri	http://hdl.handle.net/11400/14901
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-s2.0-48049092035&citeCnt=0&noHighlight=false&sort=plf-f&src=s&sid=7F04C384A08FCCC9964A7BA0BE6ED47D.ZmAySxCHIBxxTXbnsoe5w%3a1470&sot=autdocs&sdt=autdocs&sl=17&s=AU-ID%286506377132%29&relpos=13	en
dc.subject	Μηχανική γεωλογία
dc.subject	Γεωμετρική οπτική
dc.subject	Αριθμητικές μέθοδοι
dc.subject	Παράλληλος προγραμματισμός
dc.subject	Πρότυπα
dc.subject	Engineering geology
dc.subject	Geometrical optics
dc.subject	Multigrid methods (Numerical analysis)
dc.subject	Parallel programming (Computer science)
dc.subject	Standards
dc.title	A coupled-mode, phase-resolving model for the transformation of wave spectrum over steep 3D topography	en
heal.type	journalArticle
heal.secondaryTitle	parallel-architecture implementation	en
heal.classification	Ναυτική τέχνη και επιστήμη
heal.classification	Πληροφορική
heal.classification	Naval art and science
heal.classification	Computer science
heal.classificationURI	N/A-Ναυτική τέχνη και επιστήμη
heal.classificationURI	N/A-Πληροφορική
heal.classificationURI	http://id.loc.gov/authorities/subjects/sh85090357
heal.classificationURI	http://skos.um.es/unescothes/C00750
heal.keywordURI	http://id.loc.gov/authorities/subjects/sh85043221
heal.keywordURI	http://id.loc.gov/authorities/subjects/sh85095186
heal.keywordURI	http://id.loc.gov/authorities/subjects/sh86007818
heal.keywordURI	http://id.loc.gov/authorities/subjects/sh85097827
heal.identifier.secondary	DOI: 10.1115/1.2783883
heal.language	en
heal.access	campus
heal.recordProvider	Τεχνολογικό Εκπαιδευτικό Ίδρυμα Αθήνας. Σχολή Τεχνολογικών Εφαρμογών. Τμήμα Ναυπηγών Μηχανικών Τ.Ε.	el
heal.publicationDate	2008-02
heal.bibliographicCitation	Gerostathis, T.P., Belibassakis, K.A. and Athanassoulis, G.A. (2008) A coupled-mode, phase-resolving model for the transformation of wave spectrum over steep 3D topography: Parallel-architecture implementation. Journal of Offshore Mechanics and Arctic Engineering. [Online] 130 (1), 011001. Available from: http://www.scopus.com [Accessed 02/06/2015]	en
heal.abstract	The problem of transformation of the directional spectrum of an incident wave system over an intermediate-depth region of strongly varying 3D bottom topography is studied in the context of linear theory. The consistent coupled-mode model, developed by Athanassoulis and Belibassakis (J. Fluid Mech. 389, pp. 275-301 (1999)) and extended to three dimensions by Belibassakis et al. (Appl. Ocean Res. 23(6), pp. 319-336 (2001)) is exploited for the calculation of the linear transfer function, connecting the incident wave with the wave conditions at each point in the field. This model is fully dispersive and takes into account reflection, refraction, and diffraction phenomena, without any simplification apart the standard intermediate-depth linearization. The present approach permits the calculation of spectra of all interesting wave quantities (e.g., surface elevation, velocity, pressure) at every point in the liquid domain. The application of the present model to realistic geographical areas requires a vast amount of calculations, calling for the exploitation of advanced computational technologies. In this work, a parallel implementation of the model is developed, using the message passing programming paradigm on a commodity computer cluster. In that way, a direct numerical solution is made feasible for an area of 25 km2 over Scripps and La Jolla submarine canyons in Southern California, where a large amount of wave measurements are available. A comparison of numerical results obtained by the present model with fiem measurements of free-surface frequency spectra transformation is presented, showing excellent agreement. The present approach can be extended to treat weakly nonlinear waves, and it can be further elaborated for studying wave propagation over random bottom topography.	en
heal.publisher	ASME	en
heal.journalName	Journal of Offshore Mechanics and Arctic Engineering	en
heal.journalType	peer-reviewed
heal.fullTextAvailability	true