scholarly journals Erratum: sensitivity of the magnetorotational instability to the shear parameter in stratified simulations

2016 ◽  
Vol 457 (1) ◽  
pp. 902-902
Author(s):  
Farrukh Nauman ◽  
Eric G. Blackman
Keyword(s):  
Magnetorotational Instability ◽  
Shear Parameter

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

Vortex shedding from a circular cylinder in moderate-Reynolds-number shear flow

1980 ◽  
Vol 101 (4) ◽  
pp. 721-735 ◽  
Author(s):  
Masaru Kiya ◽  
Hisataka Tamura ◽  
Mikio Arie
Keyword(s):  
Reynolds Number ◽  
Circular Cylinder ◽  
Shear Flow ◽  
Vortex Shedding ◽  
Transverse Velocity ◽  
Number Range ◽  
Uniform Shear ◽  
Reynolds Number Range ◽  
Moderate Reynolds Number ◽  
Shear Parameter

The frequency of vortex shedding from a circular cylinder in a uniform shear flow and the flow patterns around it were experimentally investigated. The Reynolds number Re, which was defined in terms of the cylinder diameter and the approaching velocity at its centre, ranged from 35 to 1500. The shear parameter, which is the transverse velocity gradient of the shear flow non-dimensionalized by the above two quantities, was varied from 0 to 0·25. The critical Reynolds number beyond which vortex shedding from the cylinder occurred was found to be higher than that for a uniform stream and increased approximately linearly with increasing shear parameter when it was larger than about 0·06. In the Reynolds-number range 43 < Re < 220, the vortex shedding disappeared for sufficiently large shear parameters. Moreover, in the Reynolds-number range 100 < Re < 1000, the Strouhal number increased as the shear parameter increased beyond about 0·1.

The formation mechanism and shedding frequency of vortices from a sphere in uniform shear flow

1995 ◽  
Vol 287 ◽  
pp. 151-171 ◽  
Author(s):  
Hiroshi Sakamoto ◽  
Hiroyuki Haniu
Keyword(s):  
Reynolds Number ◽  
Shear Flow ◽  
Formation Mechanism ◽  
Vortex Shedding ◽  
Uniform Flow ◽  
Sphere Diameter ◽  
Uniform Shear ◽  
Uniform Shear Flow ◽  
Vortex Loops ◽  
Shear Parameter

Experiments to investigate the formation mechanism and frequency of vortex shedding from a sphere in uniform shear flow were conducted in a water channel using flow visualization and velocity measurement. The Reynolds number, defined in terms of the sphere diameter and approach velocity at its centre, ranged from 200 to 3000. The shear parameter K, defined as the transverse velocity gradient of the shear flow non-dimensionalized by the above two parameters, was varied from 0 to 0.25. The critical Reynolds number beyond which vortex shedding from the sphere occurred was found to be lower than that for uniform flow and decreased approximately linearly with increasing shear parameter. Also, the Strouhal number of the hairpin-shaped vortex loops became larger than that for uniform flow and increased as the shear parameter increased.The formation mechanism and the structure of vortex shedding were examined on the basis of series of photographs and subsequent image processing using computer graphics. The range of Reynolds number in the present investigation, extending up to 3000, could be classified into three regions on the basis of this study, and it was observed that the wake configuration did not differ substantially from that for uniform flow. Also, unlike the detachment point of vortex loops in uniform flow, which was irregularly located along the circumference of the sphere, the detachment point in shear flow was always on the high-velocity side.

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 Aspect ratio dependence in magnetorotational instability shearing box simulations

2008 ◽  
Vol 487 (1) ◽  
pp. 1-5 ◽  
Author(s):  
G. Bodo ◽  
A. Mignone ◽  
F. Cattaneo ◽  
P. Rossi ◽  
A. Ferrari
Keyword(s):  
Aspect Ratio ◽  
Magnetorotational Instability ◽  
Ratio Dependence
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