Study of vibrations due to vortex shedding(VIV) in the wake of a cylinder that is exposed to a current is very important, especially for marine risers which are used to extract oil and gas from sea bed. The phenomenon of vortex induced vibration(VIV) has been one of the major concerns for hydrodynamic researchers due to its potential ability to cause severe fatigue damage, the hydrodynamics of VIV is a very complex subject to be dealt with. Though there are numbers of research papers about VIV simulation of a circular cylinder, most of them were related to 2D flow and lower Reynolds number. 3D numerical simulation of vortex induced vibration at high Reynolds number can be very challenging.

Successful 3D simulation can be useful for designing effective VIV suppression devices.

Suitable mesh and turbulence model are important to get desired results, analyzing computational time and resources are crucial before starting such projects. In this paper turbulence model such as DES and LES are used at three dimensional VIV simulation for a Reynolds number Re=104, results from CFD are compared with existing experimental results. A comparison was drawn between these two turbulence models in terms of result accuracy and computation time.

Hopefully discussion of this paper can be helpful for any future project that would deal with VIV simulation.

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