Influence of global rotation and Reynolds number on the large-scale features of a turbulent Taylor-Couette flow
Résumé
We study the torque scaling and the angular momentum transport mechanisms in a turbulent flow between two independently rotating cylinders. Depending on the angular velocities ratio, we identify two different states: one with large scale vortical structures in the secondary mean flow, and the other one with no large scale features. At constant shear, varying the angular velocities ratio, we then study the transition between these two states. This transition is smooth and continuous. It resembles a supercritical bifurcation of the secondary mean flow on a turbulent flow.
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