Vortex induced vibrations of a pair of cylinders at Reynolds number 1000

Mittal, S. ; Kumar, V. (2004) Vortex induced vibrations of a pair of cylinders at Reynolds number 1000 International Journal of Computational Fluid Dynamics, 18 (7). pp. 601-614. ISSN 1061-8562

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Related URL: http://dx.doi.org/10.1080/1061856031000137017


Vortex induced vibrations of two equal-sized cylinders in tandem and staggered arrangement placed in uniform incompressible flow is studied. A stabilized finite element formulation is utilized to solve the governing equations. The Reynolds number for these 2D simulations is 1000. The cylinders are separated by 5.5 times the cylinder diameter in the streamwise direction. For the staggered arrangement, the cross-flow spacing between the two cylinders is 0.7 times the cylinder diameter. In this arrangement, the downstream cylinder lies in the wake of the upstream one and therefore experiences an unsteady inflow. The wake looses its temporal periodicity, beyond a few diameters downstream of the front cylinder. The upstream cylinder responds as an isolated single cylinder while the downstream one undergoes disorganized motion. Soft-lock-in is observed in almost all the cases.

Item Type:Article
Source:Copyright of this article belongs to Taylor and Francis Ltd.
Keywords:Vortex Shedding; Unsteady Flow; Lock-in; Finite Elements
ID Code:24706
Deposited On:30 Nov 2010 09:24
Last Modified:07 Jun 2011 06:58

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