If CFD is considered for modeling VIV suppression devices such as Fairings, how would you model the rotational damping between the freely rotating fairing and the rigid riser pipe? Modelling the fairing on a riser pipe, rigidly connected is typically done by researchers to evaluate its effectiveness in suppressing VIV; however, is it important to model the rotational damping to accurately model this. In physical modeling, the fairings are typically allowed to rotate freely (with certain damping) over the pipe.
I suggest Orcaflex which has an excellent VIV modeling capability that can also capture the layered density and layered directional currents as well as any inclination in the riser string. The damping will be somewhat a function of the mechanical segment length of the fairings, and how they are attached to the riser pipe and the relative rotational speed and clearances between the rotating parts and the non-rotating parts. Journal bearing models in tribology texts might have what you need?
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