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Prediction of Hydro-dynamic Force Coefficients and Shedding Frequency during Vortex Shedding Behind a Stationary Cylinder

Chandran Vidya, Sheeja Janardhanan, Sekar M

Abstract


Vibration of slender cylinders caused by the shedding of vortices at the wake, known as vortex induced vibrations (VIV) is a topic of great research interest, since the phenomenon can reduce the fatigue life of marine risers, which are subjected to complex flow conditions in ocean environment. This paper studies in detail the accuracy with which hydrodynamic forces are predicted by different turbulence models such as k–ε and k– ω-shear stress transport (SST) turbulence models. Numerical simulations have been carried out in commercial solver ANSYS FLUENT. Present study compares the results of numerical simulations of flow around a stationary cylinder at Re= 1000. It has been evidently proved from this study, mesh size and skewness not only of the near body elements, but also of those in the far flow field influences the shedding phenomenon, especially the shedding frequency.

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References


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