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Seminars

Three dimensional Tayler instability of Hall MHD

Hold Date
2019-01-10 16:00〜2019-01-10 17:30
Place
Lecture Room M W1-C-512, West Zone 1, Ito campus, Kyushu University
Object person
 
Speaker
Rong ZOU (Zhejiang Normal University)

Abstract:
The Tayler instability of Hall MHD is studied by calculating the energy of disturbances. A static equilibrium in an azimuthal magnetic field is considered. Both the axisymmetric and nonaxisymmetric disturbances are discussed. By the energy principle, the positivity of potential energy is sufficient for the stability of flows. We obtain the sufficient condition for the stability of Hall MHD, which is weakened to the condition for MHD stability when the Hall effect is neglected as shown by R. J. Tayler.