3 N ov 2 01 6 Two - dimensionalization of the flow driven by a slowly rotating impeller in a rapidly rotating fluid


We characterize the two-dimensionalization process in the turbulent flow produced by an impeller rotating at a rate ω in a fluid rotating at a rate Ω around the same axis for Rossby number Ro = ω/Ω down to 10 −2. The flow can be described as the superposition of a large-scale vertically invariant global rotation and small-scale shear layers detached from… (More)


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