Bulletin of the American Physical Society
74th Annual Meeting of the APS Division of Fluid Dynamics
Volume 66, Number 17
Sunday–Tuesday, November 21–23, 2021; Phoenix Convention Center, Phoenix, Arizona
Session P24: Vortex Dynamics and Vortex Flows: Propulsion and Wakes
4:05 PM–6:41 PM,
Monday, November 22, 2021
Room: North 224 B
Chair: Mark Stremler, Virginia Tech
Abstract: P24.00002 : Flow-induced vibration of a circular cylinder placed in the wake of an upstream cylinder, forced to oscillate in the crossflow direction *
4:18 PM–4:31 PM
Presenter:
Sarah Dulac
(University of Massachusetts Dartmouth)
Authors:
Sarah Dulac
(University of Massachusetts Dartmouth)
Hamed Samandari
(University of Massachusetts Dartmouth)
Banafsheh Seyed-Aghazadeh
(University of Massachusetts Dartmouth)
The FIV response of the downstream cylinder varied at each forcing frequency ratio due to the different wake dynamics created at each case. For excitation frequency ratios of 0.5 and 1, the lock-in ranges were extended, where for frequency ratio of 1, continuous large-amplitude oscillations persisted to the highest reduced velocity tested. At frequency ratios of 2 and 3, the onset of lock-in was delayed to higher reduced velocities. Contributions of sub- and super-harmonics were observed in the frequency contents of oscillations.
*This research work is supported by UMass Dartmouth's Marine and Undersea Technology (MUST) Research Program funded by the Office of Naval Research (ONR) under Grant No. N00014-20-1-2170.
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