The Traveling-Wave MRI in Cylindrical Taylor-Couette Flow: Comparing Wavelengths and Speeds in Theory and Experiment | Zendy

Günther Rüdiger | Zendy; Rainer Hollerbach | Zendy; Frank Stefani | Zendy; Thomas Gundrum | Zendy; G. Gerbeth | Zendy; Robert Rosner | Zendy

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The Traveling-Wave MRI in Cylindrical Taylor-Couette Flow: Comparing Wavelengths and Speeds in Theory and Experiment

Author(s) -

Günther Rüdiger,

Rainer Hollerbach,

Frank Stefani,

Thomas Gundrum,

G. Gerbeth,

Robert Rosner

Publication year - 2006

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/508422

Subject(s) - wavelength , physics , rotation (mathematics) , azimuth , mechanics , magnetorotational instability , instability , traveling wave , magnetic field , taylor–couette flow , flow (mathematics) , classical mechanics , couette flow , field (mathematics) , optics , magnetohydrodynamics , geometry , mathematical analysis , mathematics , quantum mechanics , pure mathematics

We study experimentally the flow of a liquid metal confined betweendifferentially rotating cylinders, in the presence of externally imposed axialand azimuthal magnetic fields. For increasingly large azimuthal fields awave-like disturbance arises, traveling along the axis of the cylinders. Thewavelengths and speeds of these structures, as well as the field strengths androtation rates at which they arise, are broadly consistent with theoreticalpredictions of such a traveling wave magnetorotational instability.Comment: 5 pages, 3 figures, accepted by Ap

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