Flow structures around an equilateral triangle arrangement of three spheres

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dc.contributor.authorOzgoren, Muammer
dc.date.accessioned2020-03-26T18:42:00Z
dc.date.available2020-03-26T18:42:00Z
dc.date.issued2013
dc.departmentSelçuk Üniversitesien_US
dc.description.abstractThis paper represents the results of an experimental study on the flow structure around a single sphere and three spheres in an equilateral-triangular arrangement. Flow field measurements were performed using a Particle Image Velocimetry (PIV) technique and dye visualization in an open water channel for a Reynolds number of Re = 5 x 10(3) based on the sphere diameter. The distributions and flow features at the critical locations of the contours of the velocity fluctuations, the patterns of sectional streamlines, the vorticity contours, the turbulent kinetic energy, the Reynolds stress correlations and shedding frequency are discussed. The gap ratios (G/D) of the three spheres were varied in the range of 1.0 <= G/D <= 2.5 where G was the distance between the sphere centers, and D was the sphere diameter which was taken as 30 mm. Due to the interference of the shedding shear layers and the wakes, more complex features of the flow patterns can be found in the wake region of the two downstream spheres behind the leading sphere. For G/D = 1.25, a jet-like flow around the leading sphere through the gap between the two downstream spheres occurred, which significantly enhanced the wake region. It was observed that a continuous flow development involving shearing phenomena and the interactions of shedding vortices caused a high rate of fluctuations over the whole flow field although most of the time-averaged flow patterns were almost symmetric about the two downstream spheres. (C) 2013 Elsevier Ltd. All rights reserved.en_US
dc.description.sponsorshipTUBITAKTurkiye Bilimsel ve Teknolojik Arastirma Kurumu (TUBITAK) [109R028]; Scientific Research Projects Office of Cukurova UniversityCukurova University [AAP20025]; Selcuk University's Scientific Research Project OfficeSelcuk University [2004/131]; DPT project of Selcuk University's Advanced Research CenterSelcuk University [2009K12180]en_US
dc.description.sponsorshipThe author would like to acknowledge TUBITAK Contract No.: 109R028, Scientific Research Projects Office of Cukurova University for funding under Contract No.: AAP20025, Selcuk University's Scientific Research Project Office 2004/131, and DPT project of Selcuk University's Advanced Research Center Contract No.: 2009K12180. The author thanks specially Prof. Besir Sahin and Prof. Huseyin Akilli who let the author use their experimental facility.en_US
dc.identifier.doi10.1016/j.ijmultiphaseflow.2013.02.001en_US
dc.identifier.endpage64en_US
dc.identifier.issn0301-9322en_US
dc.identifier.issn1879-3533en_US
dc.identifier.scopusqualityQ1en_US
dc.identifier.startpage54en_US
dc.identifier.urihttps://dx.doi.org/10.1016/j.ijmultiphaseflow.2013.02.001
dc.identifier.urihttps://hdl.handle.net/20.500.12395/29525
dc.identifier.volume53en_US
dc.identifier.wosWOS:000318888800005en_US
dc.identifier.wosqualityQ1en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherPERGAMON-ELSEVIER SCIENCE LTDen_US
dc.relation.ispartofINTERNATIONAL JOURNAL OF MULTIPHASE FLOWen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.selcuk20240510_oaigen_US
dc.subjectEquilateral-triangular arrangementen_US
dc.subjectInstabilityen_US
dc.subjectPIVen_US
dc.subjectSphereen_US
dc.subjectTurbulenceen_US
dc.subjectVortex sheddingen_US
dc.subjectVorticityen_US
dc.titleFlow structures around an equilateral triangle arrangement of three spheresen_US
dc.typeArticleen_US

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