Comparison of Flow Characteristics of Different Sphere Geometries Under the Free Surface Effect

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dc.contributor.authorÖzgören, Muammer
dc.contributor.authorDoğan, Sercan
dc.contributor.authorOkbaz, Abdulkerim
dc.contributor.authorAksoy, Muharrem Hilmi
dc.contributor.authorŞahin, Beşir
dc.contributor.authorAkıllı, Hakan
dc.date.accessioned2020-03-26T18:41:20Z
dc.date.available2020-03-26T18:41:20Z
dc.date.issued2013
dc.departmentSelçuk Üniversitesien_US
dc.description7th International Conference on Experimental Fluid Mechanics (EFM) -- NOV 20-23, 2012 -- Tech Univ Liberec (TU Liberec), Hradec Kralove, CZECH REPUBLICen_US
dc.description.abstractComparison of the experimental results of turbulent flow structures between a smooth sphere and a sphere with a vent hole, roughened, and o-ring is presented in the presence of a free-surface. Dye visualization and particle image velocimetry (PIV) techniques were performed to examine effects of passive control methods on the sphere wake for Reynolds number Re = 5000 based on the sphere diameter with a 42.5mm in an open water channel. Instantaneous and time-averaged flow patterns in the wake region of the sphere were examined from point of flow physics for the different sphere locations in the range of 0 <= h/D <= 2.0 where h was the space between the top point of the sphere and the free surface. The ratio of ventilation hole to sphere diameter was 0.15, o-ring was located at 55 degrees with a 2 mm from front stagnation point of the sphere and roughened surface was formed by means of totally 410 circular holes with a 3 mm diameter and around 2 mm depth in an equilateral triangle arrangement. The flow characteristics of instantaneous velocity vectors, vorticity contours, time-averaged streamline patterns, Reynolds stress correlations and streamwise and cross-stream velocity fluctuations for both the smooth and passively controlled sphere were interpreted.en_US
dc.description.sponsorshipDantec Dynam GmbH, Kamax Holding, LENAM s r o, MIT s r o, SPECION s r oen_US
dc.identifier.doi10.1051/epjconf/20134501022en_US
dc.identifier.isbn978-80-7372-912-7
dc.identifier.issn2100-014Xen_US
dc.identifier.scopusqualityN/Aen_US
dc.identifier.urihttps://dx.doi.org/10.1051/epjconf/20134501022
dc.identifier.urihttps://hdl.handle.net/20.500.12395/29315
dc.identifier.volume45en_US
dc.identifier.wosWOS:000319932200022en_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.ispartofEFM12 - EXPERIMENTAL FLUID MECHANICS 2012en_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.titleComparison of Flow Characteristics of Different Sphere Geometries Under the Free Surface Effecten_US
dc.typeConference Objecten_US

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