| Author | de Wilde, J.J., Huijsmans, R.H.M. and Tukker, J. (MARIN) |
| Title | Experimental investigation into the vortex formation in the wake of an oscillating cylinder using Particle Image Velocimetry |
| Conference/Journal | ISOPE Conference, San Francisco |
| Paper no. | ISOPE2006-JSC-434 |
| Month | May |
| Year | 2006 |
Abstract
In this paper a novel experimental investigation into the vortex formation in the wake of a fixed and an oscillating circular cylinder is presented. The aim of the study is to acquire a better understanding of the complex three-dimensional vortex flow around the cylinder at high Reynolds numbers, as well as to set up a method for the validation of CFD for riser VIV applications. The Reynolds number in the experiments ranged from 40,000 to 200,000.
A 200 mm rigid cylinder of 3.4 m length was towed at constant speed in a 210 m long towing basin. The fluid loads on the cylinder were measured and state-of-the-art 3 component Particle Image Velocimetry (PIV) measurements were carried out in a 2-D plane of 400 x 700 mm in the downstream wake of the cylinder. A fixed cylinder and a oscillating cylinder were tested. The range of amplitudes and frequencies was tested for the oscillating cylinder in the lock-in region. The tests give new insight in the vortex
synchronisation and will provide a valuable set of data for future CFD-code validation.
In this paper a novel experimental investigation into the vortex formation in the wake of a fixed and an oscillating circular cylinder is presented. The aim of the study is to acquire a better understanding of the complex three-dimensional vortex flow around the cylinder at high Reynolds numbers, as well as to set up a method for the validation of CFD for riser VIV applications. The Reynolds number in the experiments ranged from 40,000 to 200,000.
A 200 mm rigid cylinder of 3.4 m length was towed at constant speed in a 210 m long towing basin. The fluid loads on the cylinder were measured and state-of-the-art 3 component Particle Image Velocimetry (PIV) measurements were carried out in a 2-D plane of 400 x 700 mm in the downstream wake of the cylinder. A fixed cylinder and a oscillating cylinder were tested. The range of amplitudes and frequencies was tested for the oscillating cylinder in the lock-in region. The tests give new insight in the vortex
synchronisation and will provide a valuable set of data for future CFD-code validation.