Second-order hydrodynamic effects on an arrangement of two concentric truncated vertical cylinders

Mavrakos, SA; Chatjigeorgiou, IK

dc.contributor.author	Mavrakos, SA	en
dc.contributor.author	Chatjigeorgiou, IK	en
dc.date.accessioned	2014-03-01T01:31:50Z
dc.date.available	2014-03-01T01:31:50Z
dc.date.issued	2009	en
dc.identifier.issn	0951-8339	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/19953
dc.subject	Concentric cylinders	en
dc.subject	Exciting wave forces	en
dc.subject	Moonpool	en
dc.subject	Second-order theory	en
dc.subject.classification	Engineering, Marine	en
dc.subject.classification	Engineering, Civil	en
dc.subject.other	Axisymmetric	en
dc.subject.other	Concentric cylinders	en
dc.subject.other	Diffraction problem	en
dc.subject.other	Eigenfunction expansions	en
dc.subject.other	Exciting wave forces	en
dc.subject.other	First-order	en
dc.subject.other	Fluid domain	en
dc.subject.other	Fluid motions	en
dc.subject.other	Fluid pressures	en
dc.subject.other	Fluid regions	en
dc.subject.other	Free surfaces	en
dc.subject.other	Free-surface boundary conditions	en
dc.subject.other	Hydrodynamic effect	en
dc.subject.other	Hydrodynamic loading	en
dc.subject.other	Incident waves	en
dc.subject.other	Matching condition	en
dc.subject.other	Maximum values	en
dc.subject.other	Moonpool	en
dc.subject.other	Number of components	en
dc.subject.other	Numerical results	en
dc.subject.other	Radial velocity	en
dc.subject.other	Second orders	en
dc.subject.other	Second-order theory	en
dc.subject.other	Semi-analytical	en
dc.subject.other	Solution methodology	en
dc.subject.other	Sturm-Liouville problem	en
dc.subject.other	Surface piercing	en
dc.subject.other	Two-fluid	en
dc.subject.other	Velocity potentials	en
dc.subject.other	Vertical cylinders	en
dc.subject.other	Wave force	en
dc.subject.other	Wave runup	en
dc.subject.other	Cylinders (shapes)	en
dc.subject.other	Fluid dynamics	en
dc.subject.other	Hydrodynamics	en
dc.subject.other	Sailing vessels	en
dc.subject.other	Velocity	en
dc.subject.other	Fluids	en
dc.subject.other	analytical framework	en
dc.subject.other	cylinder	en
dc.subject.other	decomposition analysis	en
dc.subject.other	diffraction	en
dc.subject.other	eigenvalue	en
dc.subject.other	expansion	en
dc.subject.other	geometry	en
dc.subject.other	hydrodynamics	en
dc.subject.other	theoretical study	en
dc.subject.other	wave runup	en
dc.subject.other	wave velocity	en
dc.title	Second-order hydrodynamic effects on an arrangement of two concentric truncated vertical cylinders	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.marstruc.2008.12.003	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.marstruc.2008.12.003	en
heal.language	English	en
heal.publicationDate	2009	en
heal.abstract	The second-order diffraction problem by a piston-like arrangement that consists of two concentric surface piercing cylinders is considered. The developed matched axisymmetric eigenfunction expansion solution methodology in cylindrical co-ordinates is based on the semi-analytical formulation of the velocity potentials in the various fluid regions which are defined by the geometry of the two-body arrangement. The main difficulty associated with the specific configuration originates from the fact that the geometry defines two fluid regions that extend up to the free surface in which the inhomogeneous second-order free surface boundary condition has to be fulfilled. To this end the associated velocity potentials in these regions are decomposed into a number of components defining the so-called 'free' and 'locked' waves. The latter are calculated by solving the resulting Sturm-Liouville problems. The seek second-order velocity potential in the whole fluid domain is then derived by enforcing matching conditions for the radial velocities and the fluid pressures at the cylindrical boundaries of adjacent fluid domains. Numerical results concerning the second-order hydrodynamic loading and the wave run-up on the cylinders are given, whereas special attention is given at incident wave frequency regions where the first-order exciting wave forces attain maximum values due to the resonant fluid motions in the moonpool. (C) 2008 Elsevier Ltd. All rights reserved.	en
heal.publisher	ELSEVIER SCI LTD	en
heal.journalName	Marine Structures	en
dc.identifier.doi	10.1016/j.marstruc.2008.12.003	en
dc.identifier.isi	ISI:000268643400010	en
dc.identifier.volume	22	en
dc.identifier.issue	3	en
dc.identifier.spage	545	en
dc.identifier.epage	575	en