On the relation of standard and helical magnetorotational instability

Details On the relation of standard and helical magnetorotational instability On the relation of standard and helical magnetorotational instability

2009-10-31

arxiv.org/abs/0911.0067v1

The Astrophysical Journal, 712 (2010) 52-68

Astronomy and Astrophysics

Astrophysics

High Energy Astrophysical Phenomena

48 pages, 13 figures

Scientific paper

10.1088/0004-637X/712/1/52

The magnetorotational instability (MRI) plays a crucial role for cosmic structure formation by enabling turbulence in Keplerian disks which would be otherwise hydrodynamically stable. With particular focus on MRI experiments with liquid metals, which have small magnetic Prandtl numbers, it has been shown that the helical version of this instability (HMRI) has a scaling behaviour that is quite different from that of the standard MRI (SMRI). We discuss the relation of HMRI to SMRI by exploring various parameter dependencies. We identify the mechanism of transfer of instability between modes through a spectral exceptional point that explains both the transition from a stationary instability (SMRI) to an unstable travelling wave (HMRI) and the excitation of HMRI in the inductionless limit. For certain parameter regions we find new islands of the HMRI.

Affiliated with

Also associated with

No associations

Rating

On the relation of standard and helical magnetorotational instability does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with On the relation of standard and helical magnetorotational instability, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and On the relation of standard and helical magnetorotational instability will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-150035