scholarly journals Two types of axisymmetric helical magnetorotational instability in rotating flows with positive shear

2019 ◽  
Vol 4 (10) ◽  
Author(s):  
George Mamatsashvili ◽  
Frank Stefani ◽  
Rainer Hollerbach ◽  
Günther Rüdiger
Keyword(s):  
Rotating Flows ◽  
Magnetorotational Instability

scholarly journals WKB thresholds of standard, helical, and azimuthal magnetorotational instability

2012 ◽  
Vol 8 (S290) ◽  
pp. 233-234 ◽  
Author(s):  
Oleg Kirillov ◽  
Frank Stefani
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Prandtl Number ◽  
Local Stability ◽  
Rotating Flows ◽  
Rossby Number ◽  
Magnetorotational Instability ◽  
Electrically Conducting ◽  
Magnetic Prandtl Number ◽  
Wavelength Approximation

AbstractWe consider rotating flows of an electrically conducting, viscous and resistive fluid in an external magnetic field with arbitrary combinations of axial and azimuthal components. Within the short-wavelength approximation, the local stability of the flow is studied with respect to perturbations of arbitrary azimuthal wavenumbers. In the limit of vanishing magnetic Prandtl number (Pm) we find that the maximum critical Rossby number (Ro) for the occurrence of the magnetorotational instability (MRI) is universally governed by the Liu limit ${\rm Ro}_{Liu}=2-2\sqrt{2}\approx -0.828$ which is below the value for Keplerian rotation RoKepler = −0.75.

Liquid metal experiments on the magnetorotational instability

2009 ◽  
Vol 45 (2) ◽  
pp. 135-144 ◽  
Author(s):  
F. Stefani ◽  
G. Gerbeth ◽  
Th. Gundrum ◽  
J. Szklarski ◽  
G. Rüdiger ◽  
...  
Keyword(s):  
Liquid Metal ◽  
Magnetorotational Instability

Irregular Singularity of the Magnetorotational Instability in a Keplerian Disk

2007 ◽  
Vol 659 (2) ◽  
pp. 1496-1504 ◽  
Author(s):  
M. Furukawa ◽  
Z. Yoshida ◽  
M. Hirota ◽  
V. Krishan
Keyword(s):  
Irregular Singularity ◽  
Magnetorotational Instability

Effect of Viscosity on the Development of the Magnetorotational Instability in a Ring Channel

2018 ◽  
Vol 10 (6) ◽  
pp. 721-729
Author(s):  
V. M. Chechetkin ◽  
K. R. Sychugov ◽  
A. Yu. Lugovsky ◽  
A. N. Pastuhov
Keyword(s):  
Magnetorotational Instability ◽  
Ring Channel

scholarly journals The magnetorotational instability in debris-disc gas

2016 ◽  
Vol 461 (2) ◽  
pp. 1614-1620 ◽  
Author(s):  
Quentin Kral ◽  
Henrik Latter
Keyword(s):  
Magnetorotational Instability

scholarly journals Anomalous scaling of passive scalars in rotating flows

2011 ◽  
Vol 83 (6) ◽  
Author(s):  
P. Rodriguez Imazio ◽  
P. D. Mininni
Keyword(s):  
Rotating Flows ◽  
Anomalous Scaling ◽  
Passive Scalars
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