Reynolds number scaling of influence of boundary layers on the global behavior of laboratory quasi-Keplerian flows

Abstract

We present measurements of quasi-Keplerian flows in a Taylor-Couette device that identify the boundary conditions required to generate near-ideal flows that exhibit self-similarity under scaling of the Reynolds number. These experiments are contrasted with alternate boundary configurations that result in flows that progressively deviate from ideal Couette rotation as the Reynolds number is increased. These behaviors are quantitatively explained in terms of the tendency to generate global Ekman circulation and the balance of angular momentum fluxes through the axial and radial boundary layers.

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• Taylor-Couette flow for astrophysical purposes
• Transport properties of the Azimuthal Magnetorotational Instability
• Experiments and long-term High Performance Computations on amplitude modulations of strato-rotational flows
• Quasi-two-dimensional nonlinear evolution of helical magnetorotational instability in a magnetized Taylor-Couette flow
• Angular Momentum Transport by Keplerian Turbulence in Liquid Metals