Critical mass in vortex-induced vibration of a cylinder

Govardhan, R and Williamson, CHK (2004) Critical mass in vortex-induced vibration of a cylinder. In: European Journal of Mechanics - B/Fluids, 23 (1).

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Abstract

In this paper, we study the transverse vortex-induced vibrations of a cylinder at low mass-damping values. The response in this case consists of three distinct branches; namely the initial, upper and lower branches. For an elastically-mounted cylinder, the oscillation frequency can,be shown to be primarily dependent on the mass ratio (m* = mass/displaced fluid mass). For large mass ratios, m* = O(100), the vibration frequency for synchronization lies close to the natural frequency (f* = f/f(N) similar to 1.0), but as mass is reduced to m* = O(1), f* can reach remarkably large values. We deduce an expression for the frequency of the lower-branch vibration, at small mass-damping values, as follows:

Item Type:	Journal Article
Additional Information:	Copyright of this article belongs to Elsevier.
Keywords:	Vortex;Vibration;Critical mass; Cylinder;Dynamics.
Department/Centre:	Division of Mechanical Sciences > Mechanical Engineering
Date Deposited:	18 Dec 2008 10:29
Last Modified:	19 Sep 2010 04:53
URI:	http://eprints.iisc.ernet.in/id/eprint/16801

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