Hydromagnetic Instability in plane Couette Flow

Details Hydromagnetic Instability in plane Couette Flow Hydromagnetic Instability in plane Couette Flow

2007-06-19

arxiv.org/abs/0706.2690v1

Phys.Rev.E76:016303,2007

Astronomy and Astrophysics

Astrophysics

6 pages, 5 figures. To appear on PRE

Scientific paper

10.1103/PhysRevE.76.016303

We study the stability of a compressible magnetic plane Couette flow and show that compressibility profoundly alters the stability properties if the magnetic field has a component perpendicular to the direction of flow. The necessary condition of a newly found instability can be satisfied in a wide variety of flows in laboratory and astrophysical conditions. The instability can operate even in a very strong magnetic field which entirely suppresses other MHD instabilities. The growth time of this instability can be rather short and reach $\sim 10$ shear timescales.

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