Circular cylinders exposed to vortex-induced vibrations in restricted waters: VIV response from the bottom to the free surface

Basit Öğe Kaydı
dc.authorid0000-0002-3364-1635
dc.authorid0000-0002-2956-9562
dc.contributor.authorDuranay, Aytekin
dc.contributor.authorDemirhan, Alkin Erdal
dc.contributor.authorDobrucali, Erinc
dc.contributor.authorKinaci, Omer Kemal
dc.date.accessioned2026-02-08T15:15:07Z
dc.date.available2026-02-08T15:15:07Z
dc.date.issued2025
dc.departmentBursa Teknik Üniversitesi
dc.description.abstractIn this paper, we present a comprehensive experimental investigation into the effect of bottom and free surface boundaries on vortex-induced vibrations (VIV) of a freely oscillating circular cylinder. Effects of the boundaries were examined under varying gap ratios between the cylinder and these boundaries at a low mass ratio of m(r)=0.827, only in the cross-flow direction, in the Reynolds number range of 1.210(4) <= Re <= 910(4). The gap ratios, varied from -0.75 to 2, correspond to an approximate Froude number (Fr) of around 0.50. We have examined the VIV response of this cylinder through thirteen tests conducted in various stages: near the bottom boundary, at a sufficient distance from all boundaries, close to the free water surface, and partially submerged. The findings show that as the cylinder approaches the free surface, the synchronization range gradually narrows, and the amplitude response diminishes. Within these cases, frequencies deviate from the general trend nearby the end of the synchronization range. Upon the cylinder's upper surface contacting or penetrating the free surface, the VIV synchronization starts at a higher non-dimensional velocity. In the cases of piercing cylinders, a wide synchronization range was observed where the submergence of the body was only around 25 %. The cylinders piercing the free surface showcase a distinctive frequency pattern, revealing a nearly-constant trend despite the escalating flow velocity within the synchronization range. Lower amplitude and broader range of synchronization were observed in the experiments close to the bottom boundary. As the cylinder moves further from the bottom, the boundary effect vanishes and the amplitudes get higher.
dc.description.sponsorshipResearch Fund of Bursa Technical University [221N002]
dc.description.sponsorshipThis study was supported by the Research Fund of Bursa Technical University. Project ID: 221N002.
dc.identifier.doi10.1016/j.apor.2025.104430
dc.identifier.issn0141-1187
dc.identifier.issn1879-1549
dc.identifier.scopus2-s2.0-85215231650
dc.identifier.scopusqualityQ1
dc.identifier.urihttps://doi.org/10.1016/j.apor.2025.104430
dc.identifier.urihttps://hdl.handle.net/20.500.12885/5614
dc.identifier.volume154
dc.identifier.wosWOS:001404935000001
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherElsevier Sci Ltd
dc.relation.ispartofApplied Ocean Research
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/openAccess
dc.snmzWOS_KA_20260207
dc.subjectVortex-induced vibrations
dc.subjectVIV
dc.subjectFree surface
dc.subjectPiercing
dc.subjectBottom effect
dc.titleCircular cylinders exposed to vortex-induced vibrations in restricted waters: VIV response from the bottom to the free surface
dc.typeArticle

Dosyalar

Koleksiyon

WoS İndeksli Yayınlar Koleksiyonu
Scopus İndeksli Yayınlar Koleksiyonu