MOTIONS, FORCES AND MODE TRANSITIONS IN VORTEX-INDUCED VIBRATIONS AT LOW MASS-DAMPING

Vortex mode selection of a rigid cylinder subject to VIV at low mass-damping

We present direct numerical simulations results of vortex-induced vibrations of a freely vibrating rigid cylinder with low mass-damping parameter using a spectral/hp element method. We investigate several reduced velocities to assess the validity of the ‘‘three-branch response’’ and its sensitivity to Reynolds number in the range 1000–3000. This study addresses the numerical challenge of captur...

Vortex-Induced Vibrations of an Inclined Cylinder in Flow

Vortex Induced Vibrations Analysis Across a Tapered Tower

In this paper, 3D flow past a long tapered tower is examined. A tapered tower is described by the taper ratio. Tapered cylinders are a good description of many structures, like wind turbine tower e.t.c. Similar to the flow around cylinders, the Reynolds number is the important flow parameter, and the Strouhal number represents the shedding frequency. These flow patterns are difficult to predict...

Scale test facility for measuring vortex induced vibrations

Perturbation of Vortex Induced Vibrations on a Square Section Cylinder

This paper addresses the vibration of a square section cylinder due to the alternate vortex shedding at moderate Reynolds number (3500). The numerical investigation is focused on the perturbation of the vortex shedding in order to decrease the amplitude of the vibrations at lock-in. By analyzing the unsteady flow results, we show that a control technique spatially localized at the surface of th...