dc.contributor.authorGao, Yangyang
dc.contributor.authorSun, Zhilin
dc.contributor.authorTan, Danielle S
dc.contributor.authorYu, Dingyong
dc.contributor.authorTan, Soon Keat
dc.identifier.citationGao, Y., Sun, Z., Tan, D. S., Yu, D., & Tan, S. K. (2014). Wake flow behaviour behind a smaller cylinder oscillating in the wake of an upstream stationary cylinder. Fluid dynamics research, 46(2), 025505-.en_US
dc.description.abstractThe flow patterns around a cylinder oscillating freely in the wake of a larger cylinder upstream were investigated using the particle image velocimetry technique. The upstream cylinder was fixed at both ends while the downstream smaller cylinder was held by springs such that it was free to oscillate in the transverse direction. The flow patterns, amplitudes of oscillation and vortex shedding frequencies were compared with those of a single cylinder. In the presence of the upstream cylinder, the three parameters characterizing the oscillation response of the smaller cylinder—amplitude of oscillation, vortex shedding frequency and Reynolds stresses—were greatly reduced. While their magnitude increased with gap ratio, these three parameters were still smaller than the corresponding magnitudes for a single oscillating cylinder. The peak values of turbulence statistics such as Reynolds shear stress and normal stress behind the oscillating downstream cylinder were similarly reduced, and increased with gap ratios.en_US
dc.format.extent17 p.en_US
dc.relation.ispartofseriesFluid dynamics researchen_US
dc.rights© 2014 Fluid Dynamics Research. This is the author created version of a work that has been peer reviewed and accepted for publication by Fluid Dynamics Research. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [http://dx.doi.org/10.1088/0169-5983/46/2/025505].en_US
dc.subjectDRNTU::Engineering::Civil engineering::Water resources
dc.titleWake flow behaviour behind a smaller cylinder oscillating in the wake of an upstream stationary cylinderen_US
dc.typeJournal Article
dc.contributor.researchMaritime Research Centreen_US
dc.contributor.researchNanyang Environment and Water Research Instituteen_US
dc.contributor.researchDHI-NTU Centre
dc.description.versionAccepted versionen_US

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