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Liquid metal experiments on the helical magnetorotational instability
Frank Stefani, Gunter Gerbeth, Thomas Gundrum +3
The magnetorotational instability (MRI) plays an essential role in the formation of stars and black holes. By destabilizing hydrodynamically stable Keplerian flows, the MRI trigger…
Comment on "Helical MRI in magnetized Taylor-Couette flow"
G. Ruediger, R. Hollerbach
Liu et al. [Phys. Rev. E 74, 056302 (2006)] have presented a WKB analysis of the helical magnetorotational instability (HMRI), and claim that it does not exist for Keplerian rotati…
Destabilisation of hydrodynamically stable rotation laws by azimuthal magnetic fields
G. Ruediger, R. Hollerbach, M. Schultz +1
We consider the effect of toroidal magnetic fields on hydrodynamically stable Taylor-Couette differential rotation flows. For current-free magnetic fields a nonaxisymmetric m=1 mag…
Experiments on the magnetorotational instability in helical magnetic fields
Frank Stefani, Thomas Gundrum, Gunter Gerbeth +3
The magnetorotational instability (MRI) plays a key role in the formation of stars and black holes, by enabling outward angular momentum transport in accretion disks. The use of co…
Theory of current instability experiments in magnetic Taylor-Couette flows
G. Ruediger, M. Schultz, D. Shalybkov +1
We consider the linear stability of dissipative MHD Taylor-Couette flow with imposed toroidal magnetic fields. The inner and outer cylinders can be either insulating or conducting;…
A non-axisymmetric magnetorotational instability of a purely toroidal magnetic field
R. Hollerbach, G. Rudiger, M. Schultz +1
We consider the flow of an electrically conducting fluid between differentially rotating cylinders, in the presence of an externally imposed toroidal field B_0 (r_i/r) e_phi. It is…