Comparison of flow characteristics around an equilateral triangular cylinder via PIV and Large Eddy Simulation methods

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dc.contributor.authorYagmur, Sercan
dc.contributor.authorDogan, Sercan
dc.contributor.authorAksoy, Muharrem Hilmi
dc.contributor.authorGoktepeli, Ilker
dc.contributor.authorOzgoren, Muammer
dc.date.accessioned2020-03-26T19:34:28Z
dc.date.available2020-03-26T19:34:28Z
dc.date.issued2017
dc.departmentSelçuk Üniversitesien_US
dc.description.abstractThe flow structures around an equilateral triangular Cylinder, which is commonly used as a vortex shedder in the vortex flowmeter, were investigated experimentally and numerically. Flow characteristics such as voracity contours, patterns of sectional streamlines, velocity vectors, velocity fields, Reynolds stress correlations, Strouhal numbers and drag coefficients were examined using the Particle Image Velocimetry (PIV) technique and the Large Eddy Simulation (LES) turbulence model. Experimental studies were performed in an open water channel for Re= 2.9 x 10(3), Re= 5.8 x 10(3) and Re = 1.16 x 10(4) based on the equilateral triangle edge. A sharp-tip corner of the cylinder with a triangle cross-section was exposed to the upstream side while the other two sharp -tip corners were placed on the downstream side. Numerical studies were also completed at Reynolds numbers in the range of 2.9 x 103 <= Re <= 1.16 x 10(5) to obtain the changes in the Strouhal numbers and drag coefficients. When the results of PIV and LES are considered in the same interval of Reynolds numbers, the maximum and minimum values of each flow pattern were nearly the same. The time -averaged patterns had considerable symmetry with respect to the axis line passing through the sharp -tip corner of the cross-section of the triangular cylinder. The Strouhal number was independent of the Reynolds number and was found to be approximately 0.22. The drag coefficient decreased with increasing Reynolds numbers while increasing the Power Spectral Density (PSD) and the vortex shedding frequency. For the same Reynolds numbers, the experimental and numerical results were in good agreement. Therefore, the LES turbulence model is recommended for applications of flow around this type of bluff body that is generally used in the design of vortex flowmeters to generate vortex shedding.en_US
dc.description.sponsorshipSelcuk University's Scientific Research Project OfficeSelcuk University [11401058, 11401059]; Turkish Republic Government Planning Organization (DPT) via project of Advanced Technology Research and Application Centre [2009K12180]en_US
dc.description.sponsorshipThis work is partially supported by Selcuk University's Scientific Research Project Office Contract no's. 11401058 and 11401059 and Turkish Republic Government Planning Organization (DPT) via the 2009K12180 coded project of Advanced Technology Research and Application Centre.en_US
dc.identifier.doi10.1016/j.flowmeasinst.2017.04.001en_US
dc.identifier.endpage36en_US
dc.identifier.issn0955-5986en_US
dc.identifier.issn1873-6998en_US
dc.identifier.scopusqualityQ2en_US
dc.identifier.startpage23en_US
dc.identifier.urihttps://dx.doi.org/10.1016/j.flowmeasinst.2017.04.001
dc.identifier.urihttps://hdl.handle.net/20.500.12395/34902
dc.identifier.volume55en_US
dc.identifier.wosWOS:000403861200003en_US
dc.identifier.wosqualityQ3en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherELSEVIER SCI LTDen_US
dc.relation.ispartofFLOW MEASUREMENT AND INSTRUMENTATIONen_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 cylinderen_US
dc.subjectLarge Eddy Simulation (LES)en_US
dc.subjectParticle Image Velocimetry (PIV)en_US
dc.subjectStrouhal numberen_US
dc.subjectVortex flowmeteren_US
dc.subjectVortex sheddingen_US
dc.titleComparison of flow characteristics around an equilateral triangular cylinder via PIV and Large Eddy Simulation methodsen_US
dc.typeArticleen_US

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