Publication:
Numerical investigations of flow over a confined circular cylinder

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dc.citedby5
dc.contributor.authorMathupriya P.en_US
dc.contributor.authorChan L.en_US
dc.contributor.authorHasini H.en_US
dc.contributor.authorOoi A.en_US
dc.contributor.authorid57205234006en_US
dc.contributor.authorid57139456500en_US
dc.contributor.authorid6507435998en_US
dc.contributor.authorid7005905452en_US
dc.date.accessioned2023-05-29T06:53:20Z
dc.date.available2023-05-29T06:53:20Z
dc.date.issued2018
dc.descriptionBoundary layers; Circular cylinders; Fluid mechanics; Reynolds equation; Reynolds number; Spectrum analysis; Wakes; Confinement effects; Counter rotating; Flow over a cylinder; Lift coefficient; Numerical investigations; Peak frequencies; Shedding frequencies; Three-dimensional flow; Vortex flowen_US
dc.description.abstractThe unsteady flow over a cylinder confined by two parallel walls using direct numerical simulation (DNS) is investigated. The effects of two parameters, namely the Reynolds number and the blockage ratio, are the main focus for this study. The three-dimensional flow is simulated where the circular cylinder is placed symmetrically in a planar channel with a blockage ratio of ? = 0.5 at Re = 200, 300 and 500. Quantitative analysis of the flow is conducted where the lift, CL and drag coefficient, CD and Strouhal number, St are investigated as ? and Re are systematically varied. In the present study, it is found that different instability regimes are observed as the Re of the flow increases. The presence of a distinct shedding frequency is observed at Re = 200. However, increasing the Reynolds number further, the contribution of a range of frequencies surrounding the peak frequency appears as shown in the spectral analysis of the lift coefficient. The confinement effects played an important role in changing the properties of the wake. Counter rotating spanwise vortices are formed as a result of the interaction between the cylinder wake and the boundary layer of the walls in the channel which is entrained into the vortex street. � 2018 Australasian Fluid Mechanics Society. All rights reserved.en_US
dc.description.natureFinalen_US
dc.identifier.scopus2-s2.0-85084096672
dc.identifier.urihttps://www.scopus.com/inward/record.uri?eid=2-s2.0-85084096672&partnerID=40&md5=032f8ab4d2eae748062002308f8055ca
dc.identifier.urihttps://irepository.uniten.edu.my/handle/123456789/23941
dc.publisherAustralasian Fluid Mechanics Societyen_US
dc.sourceScopus
dc.sourcetitleProceedings of the 21st Australasian Fluid Mechanics Conference, AFMC 2018
dc.titleNumerical investigations of flow over a confined circular cylinderen_US
dc.typeConference Paperen_US
dspace.entity.typePublication
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