Magnetohydrodynamic instability in differentially rotating compressible flow
نویسندگان
چکیده
منابع مشابه
Magnetohydrodynamic instability in differentially rotating compressible flow
Transport of angular momentum is one of the thrust areas of astrophysical flows. Instabilities and hence the turbulence generated by it has been invoked to understand its role in angular momentum transport in hydrodynamic and magnetohydrodynamic regime. Investigation of an unexplored region described by the parameter space Ω e < 0, Ωe being the epicyclic frequency, resulted in a powerful magnet...
متن کاملHigh-growth-rate magnetohydrodynamic instability in differentially rotating compressible flow.
The transport of angular momentum in the outward direction is the fundamental requirement for accretion to proceed in an accretion disk. This objective can be achieved if the accretion flow is turbulent. Instabilities are one of the sources for the turbulence. We study a differentially rotating compressive flow in the presence of nonvanishing radial and azimuthal magnetic field and demonstrate ...
متن کاملHydromagnetic instability in differentially rotating flows.
We study the stability of compressible differentially rotating flows in the presence of the magnetic field, and we show that the compressibility profoundly alters the previous results for a magnetized incompressible flow. The necessary condition of newly found instability can be easily satisfied in various flows in laboratory and astrophysical conditions and reads BsBphiOmega' not equal to 0, w...
متن کاملStability of compressible reduced magnetohydrodynamic equilibria - Analogy with magnetorotational instability
equilibria—Analogy with magnetorotational instability P. J. Morrison, E. Tassi, and N. Tronko Department of Physics and Institute for Fusion Studies, University of Texas at Austin, Austin, Texas 78712, USA Centre de Physique Th eorique, Aix-Marseille Universite, CNRS, CPT, UMR 7332, 13288 Marseille, France Physics Department, York Plasma Institute, University of York, YO10 5DD York, United King...
متن کاملAlfvén instability in a compressible flow.
A new ideal magnetohydrodynamic instability is presented. It is shown that linear incompressible Alfvénic disturbances can get over-reflected and exponentially amplified in compressible plasma flows. A simple and transparent stability criterion for a two-layer model is derived. The instability does not require a shear in the flow and may arise for rather moderate sub-Alfvénic flow speeds. It is...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 2008
ISSN: 0035-8711,1365-2966
DOI: 10.1111/j.1365-2966.2008.13977.x