Experimental and Numerical Investigation of Flow Structures around Cylindrical Bluff Bodies

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dc.contributor.authorYağmur, Sercan
dc.contributor.authorDoğan, Sercan
dc.contributor.authorAksoy, Muharrem Hilmi
dc.contributor.authorCanlı, Eyüb
dc.contributor.authorÖzgören, Muammer
dc.date.accessioned2020-03-26T19:05:58Z
dc.date.available2020-03-26T19:05:58Z
dc.date.issued2015
dc.departmentSelçuk Üniversitesien_US
dc.description9th International Conference on Experimental Fluid Mechanics -- NOV 18-21, 2014 -- Cesky Krumlov, CZECH REPUBLICen_US
dc.description.abstractThe understanding and quantitative prediction of velocity and pressure fluctuations in turbulent flows around such bluff bodies have been evolving over the years. The main aim of the present work is to investigate experimentally and numerically the flow field in the wake region of different bluff bodies such as circular, square and triangle cross section cylinders placed horizontally perpendicular to the uniform flow. The experimental studies were performed by Particle Image Velocimetry (PIV) method in an open water channel at Reynolds numbers 5000 and 10000 defined according to the characteristic lengths of the cylinders in the facilities of Selcuk University of Advanced Technology Research and Application Center in Turkey. The experimental results are compared to the numerical results obtained by means of transient simulation with LES turbulence model of ANSYS-Fluent Software. It is shown that the numerical and experimental results have a good agreement in respect of the instantaneous and time-averaged flow field patterns of vorticity, velocity component streamwise direction and streamline topology. In addition, drag coefficient of the geometries were also numerically calculated. For all geometries the wake length in x and y directions and size of the foci of the streamlines are decreasing by increasing Reynolds numbers in time-averaged results. The time-averaged flow patterns of both experimental and numerical results have considerable symmetry with respect to the centerline of each cylinder. Contours of the time-averaged stream wise velocity for Re=10000 demonstrate that the stagnation point around the symmetry plane moves further upstream for all cylinders in accordance with Re=5000. The maximum drag coefficient value was yielded for the square cross-section cylinder as 1.78 due to the sharp-edged geometry.en_US
dc.description.sponsorshipDANTEC Dynam GmbH, LaVis, MECAS ESI s r o, MIT s r o, TSI GmbHen_US
dc.identifier.doi10.1051/epjconf/20159202113en_US
dc.identifier.issn2100-014Xen_US
dc.identifier.scopusqualityN/Aen_US
dc.identifier.urihttps://dx.doi.org/10.1051/epjconf/20159202113
dc.identifier.urihttps://hdl.handle.net/20.500.12395/32143
dc.identifier.volume92en_US
dc.identifier.wosWOS:000358249900115en_US
dc.identifier.wosqualityN/Aen_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherE D P SCIENCESen_US
dc.relation.ispartofEFM14 - EXPERIMENTAL FLUID MECHANICS 2014en_US
dc.relation.ispartofseriesEPJ Web of Conferences
dc.relation.publicationcategoryKonferans Öğesi - Uluslararası - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.selcuk20240510_oaigen_US
dc.titleExperimental and Numerical Investigation of Flow Structures around Cylindrical Bluff Bodiesen_US
dc.typeConference Objecten_US

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