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Wind and Structures   Volume 16, Number 5, May 2013, pages 411-431
CFD-FSI simulation of vortex-induced vibrations of a circular cylinder with low mass-damping
Amir Borna, Wagdi G. Habashi, Ghyslaine McClure and Siva K. Nadarajah

Abstract     [Buy Article]
    A computational study of vortex-induced transverse vibrations of a cylinder with low mass-damping is presented. An Arbitrary Lagrangian-Eulerian (ALE) formulation of the Unsteady Reynolds-Averaged Navier-Stokes equations (URANS), along with the Spalart-Allmaras (SA) one-equation turbulence model, are coupled conservatively with rigid body motion equations of the cylinder mounted on elastic supports in order to study the amplitude and frequency response of a freely vibrating cylinder, its flow-induced motion, Vortex Street, near-wake flow structure, and unsteady loading in a moderate range of Reynolds numbers. The time accurate response of the cylinder from rest to its limit cycle is studied to explore the effects of Reynolds number on the start of large displacements, motion amplitude, and frequency. The computational results are compared with published physical experiments and numerical studies. The maximum amplitudes of displacements computed for various Reynolds numbers are smaller than the experimental values; however, the overall agreement of the results is quite satisfactory, and the upper branch of the limit-cycle displacement amplitude vs. reduced velocity response is captured, a feature that was missed by other studies. Vortex shedding modes, lock-in phenomena, frequency response, and phase angles are also in agreement with experiments.
Key Words
    vortex-induced vibrations; URANS; fluid-structure interaction; low mass-damping; turbulent flows
Amir Borna, Wagdi G. Habashi and Siva K. Nadarajah : Computational Fluid Dynamics Laboratory, Department of Mechanical Engineering, McGill University, Montreal, QC, Canada H3A 2S6;
Ghyslaine McClure : Department of Civil Engineering and Applied Mechanics, McGill University, Montreal, QC, Canada H3A 2S6

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