Investigation of flow structure around a horizontal cylinder at different elevations in shallow water

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dc.authoridTUMEN OZDIL, N. Filiz/0000-0003-0083-7524
dc.contributor.authorOzdil, N. Filiz Tumen
dc.contributor.authorAkilli, Huseyin
dc.date.accessioned2025-01-06T17:43:15Z
dc.date.available2025-01-06T17:43:15Z
dc.date.issued2015
dc.description.abstractFlow characteristics around a horizontal circular cylinder were investigated in shallow water. The diameter of circular cylinder, the height of shallow water and free stream velocity were kept constant during the experiments as D=30 mm, h(w)=60 mm and U=167 mm/s, respectively. Particle Image Velocimetry (PIV) was used to measure instantaneous and time-averaged velocity vector fields in the near wake region. In order to investigate the effect of immersion, the cylinder was placed at eight different elevations (h(p)) between bottom and free surface (from 7.5 to 60 mm with 7.5 mm increments). Instantaneous and time-averaged velocity vector field, corresponding streamline patterns and Reynolds stress correlation were used to analyze the behavior of the flow downstream of horizontal cylinder. The mean velocity vector field, corresponding streamline topology and Reynolds stress correlation were obtained using 500 instantaneous images. As the immersion level ratio (h(D)/D) increases, the magnitude of jet-like flow velocity goes up ranged from h(D)/D=0.25-1. Time averaged flow characteristics show that there is a difference between primary and developing circulation bubble depending on direction of rotation. This occurrence causes the entrainment and this stimulates the momentum transfer between the core and wake flow region for h(D)/D=1 and 2 cases. (C) 2014 Elsevier Ltd. All rights reserved.
dc.identifier.doi10.1016/j.oceaneng.2014.12.033
dc.identifier.endpage67
dc.identifier.issn0029-8018
dc.identifier.scopus2-s2.0-84921059516
dc.identifier.scopusqualityQ1
dc.identifier.startpage56
dc.identifier.urihttps://doi.org/10.1016/j.oceaneng.2014.12.033
dc.identifier.urihttps://hdl.handle.net/20.500.14669/2568
dc.identifier.volume96
dc.identifier.wosWOS:000350940500006
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherPergamon-Elsevier Science Ltd
dc.relation.ispartofOcean Engineering
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_20241211
dc.subjectHorizontal cylinder
dc.subjectFlow around the pipeline
dc.subjectParticle image velocimetry
dc.subjectSeparation
dc.titleInvestigation of flow structure around a horizontal cylinder at different elevations in shallow water
dc.typeArticle

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