Journal
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Volume 325, Issue 2, Pages L1-L5Publisher
BLACKWELL SCIENCE LTD
DOI: 10.1046/j.1365-8711.2001.04647.x
Keywords
accretion, accretion discs; instabilities; magnetic fields; MHD; planetary systems : protoplanetary discs; Galaxy : disc
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Although the magnetorotational instability (MRI) has been widely accepted as a powerful accretion mechanism in magnetized accretion discs, 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. 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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