Magnetorotational Instability in a Rotating Liquid Metal Annulus

Details Magnetorotational Instability in a Rotating Liquid Metal Annulus Magnetorotational Instability in a Rotating Liquid Metal Annulus

2001-03-14

arxiv.org/abs/astro-ph/0103226v3

Mon.Not.Roy.Astron.Soc. 325 (2001) L1

Astronomy and Astrophysics

Astrophysics

5 pages, 4 figures, published in MNRAS w/ modifications

Scientific paper

10.1046/j.1365-8711.2001.04647.x

Although the magnetorotational instability (MRI) has been widely accepted as a powerful accretion mechanism in magnetized accretion disks, it has not been realized in the laboratory. The possibility of studying MRI in a rotating liquid-metal annulus (Couette flow) is explored by local and global stability analysis and magnetohydrodynamic (MHD) simulations. Stability diagrams are drawn in dimensionless parameters, and also in terms of the angular velocities at the inner and outer cylinders. It is shown that MRI can be triggered in a moderately rapidly rotating table-top apparatus, using easy-to-handle metals such as gallium. Practical issues of this proposed experiment are discussed.

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