Active and passive wake control of a circular cylinder using rotation and surface texturing

Basit Öğe Kaydı
dc.contributor.authorAksoy, Muharrem Hilmi
dc.contributor.authorKurtulmus, Nazim
dc.contributor.authorIspir, Murat
dc.contributor.authorGoktepeli, Ilker
dc.date.accessioned2026-02-27T07:33:39Z
dc.date.available2026-02-27T07:33:39Z
dc.date.issued2026
dc.description.abstractFlow structures over circular cylinders have been widely investigated due to their practical importance and the complexity of wake interactions. In this study, combined passive and active flow control strategies have been examined for rotating cylinders with surfaces having dimples/protrusions at a Reynolds number as Re = 2 x 103. Particle Image Velocimetry (PIV) measurements have been conducted for rotation rates ranging from alpha = 0 to alpha = 1.26 to explore modifications in wake topology for different circumferential angles ((3) between 15 degrees and 60 degrees. For the stationary bare cylinders, symmetric recirculation regions including counter-rotating eddies have been observed, whereas rotation caused the separated region to contract, shifted and lost its symmetry. Dimples/ protrusions, even without rotation, altered shear layer development with effects varying according to the circumferential angle. When rotation was applied, the modified surfaces produced notable changes compared with that of the bare cylinder, including reduced negative-velocity regions and more rapid momentum recovery. The time-averaged vorticity distributions indicated the diminished vortex intensity, while the periodic organization of the shedding became less distinct at higher rotation rates. Turbulence kinetic energy and Reynolds stress correlations presented that surface modifications, particularly at (3 = 30 degrees, 45 degrees and 60 degrees, enhanced shear layer energization, delayed flow separation and disrupted wake symmetry at alpha >= 0.84. The combination of rotation and surface texturing is therefore effective in reshaping wake dynamics and attenuating large scale vortex structures, offering practical implications for flow control applications.
dc.description.sponsorshipScientific and Technological Research Council of Turkiye (TUBITAK) [2211-A]
dc.description.sponsorshipThe authors thank Konya Technical University for the experimental setup provided for the present study. The third author also acknowledges the Scientific and Technological Research Council of Turkiye (TUBITAK) for a doctoral scholarship (2211-A program).
dc.identifier.doi10.1016/j.oceaneng.2026.124281
dc.identifier.issn0029-8018
dc.identifier.issn1873-5258
dc.identifier.urihttp://dx.doi.org/10.1016/j.oceaneng.2026.124281
dc.identifier.urihttps://hdl.handle.net/20.500.14669/4650
dc.identifier.volume351
dc.identifier.wosWOS:001674986100001
dc.indekslendigikaynakWeb of Science
dc.language.isoen
dc.publisherPergamon-Elsevier Science Ltd
dc.relation.ispartofOcean Engineering
dc.relation.publicationcategoryMakale - Uluslararas� Hakemli Dergi - Kurum ��retim Eleman�
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_20260302
dc.subjectCircular cylinder
dc.subjectPIV
dc.subjectRotation
dc.subjectSurface modifications
dc.subjectWake region
dc.titleActive and passive wake control of a circular cylinder using rotation and surface texturing
dc.typeArticle

Dosyalar

Koleksiyon

WoS İndeksli Yayınlar Koleksiyonu