Publications Repository - Helmholtz-Zentrum Dresden-Rossendorf
1 PublicationNew axisymmetric helical magnetorotational instability in dissipative rotating flows with positive shear
Mamatsashvili, G.; Stefani, F.; Hollerbach, R.; Rüdiger, G.
Abstract
We present a new type of axisymmetric magnetorotational instability which is capable of destabilizing viscous and resistive magnetized flows with radially increasing angular velocity. Using short-wavelength WKB approach, supported by 1D linear stability calculations in Taylor-Couette flow, we show that this instability works only when a combination of axial and azimuthal magnetic fields is applied and when the magnetic Prandtl number is different from one. It might have grave consequences for the stability of the equator-near parts of the solar tachocline, and for the dynamo action in this region
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Lecture (Conference)
MHD Days and GdRI Dynamo Meeting, 26.-28.11.2018, Dresden, Germany
Permalink: https://www.hzdr.de/publications/Publ-28772