A study of shear flows induced by nonlinear evolution of double tearing modes in Hall magnetohydrodynamics
School of Nuclear Science and Technology, University of South
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Received in final form: 7 April 2011
Published online: 5 July 2011
Shear flows induced by the nonlinear evolution of double tearing modes are studied numerically using Hall magnetohydrodynamics simulations in a slab geometry. The Hall effect is shown to plays an important role when the thickness of current sheets decrease and falls in the range of ion inertia length di. Effective shear flows in the magnetic islands are generated during the process of magnetic reconnection and disappear finally. The induced toroidal velocity are shown to be more sensitive than the induced poloidal velocities in the Hall dominant systems. Moreover, the temporal evolution of the shear flows in the Tokamak resonant surface is studied and discussed.
© EDP Sciences, Società Italiana di Fisica and Springer-Verlag 2011