The traveling wave MRI in cylindrical Taylor-Couette flow: comparing wavelengths and speeds in theory and experiment

Abstract

We study experimentally the flow of a liquid metal confined between differentially rotating cylinders, in the presence of externally imposed axial and azimuthal magnetic fields. For increasingly large azimuthal fields a wave-like disturbance arises, traveling along the axis of the cylinders. The wavelengths and speeds of these structures, as well as the field strengths and rotation rates at which they arise, are broadly consistent with theoretical predictions of such a traveling wave magnetorotational instability.

5 pages, 3 figures, accepted by ApJ

References in corpus (3)

• New type of magneto-rotational instability in cylindrical Taylor-Couette flow
• Numerical and Experimental Investigation of Circulation in Short Cylinders
• The stability of MHD Taylor-Couette flow with current-free spiral magnetic fields between conducting cylinders

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• Noise-Sustained Convective Instability in a Magnetized Taylor-Couette Flow
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• High-speed standard magneto-rotational instability