Flow control of diamond-shaped cylinders with slots at Re=150

Basit Öğe Kaydı
dc.contributor.authorDurhasan, Tahir
dc.contributor.authorOnel, Huseyin C.
dc.contributor.authorEkinci, Firat
dc.contributor.authorAksoy, Muhammed Murat
dc.date.accessioned2026-02-27T07:33:10Z
dc.date.available2026-02-27T07:33:10Z
dc.date.issued2025
dc.description.abstractThis study presents a comprehensive numerical investigation of passive flow control around diamond cylinders with horizontal and vertical slots at a Reynolds number (Re) of 150. Using a numerical framework, it is systematically analyzed the effects of slot orientation (horizontal and vertical) and width ratio (s/D ranging from 0.05 to 0.30) on the wake dynamics. Results demonstrate that the slot orientation fundamentally determines the flow control mechanism. Horizontal slots progressively extend the vortex formation length and weaken vortex shedding intensity, ultimately achieving complete suppression of periodic shedding at s/D = 0.30, reducing drag by 37%, and eliminating fluctuating forces. In contrast, vertical slots maintain the fundamental wake structure while attenuating vortex strength, achieving a superior 50% drag reduction at s/D = 0.30 without suppressing periodicity. Pressure distribution analysis reveals that horizontal slots primarily modify base pressure through direct wake interaction, while vertical slots enhance pressure recovery without significantly altering separation characteristics. Proper orthogonal decomposition results confirm that the distinct physical mechanisms of horizontal slots redistribution of the energy between coherent modes before stabilizing the wake, while vertical slots preserve the modal structure while systematically reducing fluctuation energy. Time-averaged streamline topology reveals formation of additional focal structures in horizontal configurations, contrasting with persistent sub-wake patterns in vertical arrangements. These findings elucidate the underlying physics of passive flow control and provide crucial design guidelines for engineering applications requiring either maximum drag reduction (vertical slots) or elimination of flow fluctuations (horizontal slots) in diamond-shaped cylinders at low Reynolds numbers.
dc.identifier.doi10.1063/5.0284743
dc.identifier.issn1070-6631
dc.identifier.issn1089-7666
dc.identifier.issue8
dc.identifier.urihttp://dx.doi.org/10.1063/5.0284743
dc.identifier.urihttps://hdl.handle.net/20.500.14669/4467
dc.identifier.volume37
dc.identifier.wosWOS:001556278600015
dc.indekslendigikaynakWeb of Science
dc.language.isoen
dc.publisherAIP Publishing
dc.relation.ispartofPhysics of Fluids
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_20260302
dc.titleFlow control of diamond-shaped cylinders with slots at Re=150
dc.typeArticle

Dosyalar

Koleksiyon

WoS İndeksli Yayınlar Koleksiyonu