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- W2127913212 abstract "The vortex wake flow dynamics downstream of a cylinder undergoing streamwise harmonic (fe/fs=1) forced oscillations has been investigated numerically using a CFD code for Re=1000. The steady-state of the wake flow has been analysed considering the amplitude of oscillations as a perturbation parameter. The resulting dynamics of the fluid lift and drag forces acting on the cylinder have been linked to the different vortex wake modes observed downstream of the cylinder. Forced oscillations lead to periodic, quasi-periodic and chaotic responses depending on the amplitude of oscillation of the cylinder. Different vortex wake patterns or modes (including 2S, P+S and S modes) have also been identified and described. Symmetry related bifurcations both in the computed fluid force dynamics as well as in the vortex wake patterns were identified. The key role played by spatio-temporal symmetry in the interaction between the wake flow and the oscillating cylinder has been elucidated by a Proper Orthogonal Decomposition (POD) of the wake velocity field. Symmetric and antisymmetric spatio-temporal modes were identified and bifurcations in the wake flow were explained in terms of mode interactions in the wake." @default.
- W2127913212 created "2016-06-24" @default.
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- W2127913212 date "2006-01-01" @default.
- W2127913212 modified "2023-09-27" @default.
- W2127913212 title "Cylinder Wake Dynamics in the Presence of Stream-Wise Harmonic Forcing" @default.
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- W2127913212 doi "https://doi.org/10.1115/pvp2006-icpvt-11-93847" @default.
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