Eur. Phys. J. D 64, 365-368 (2011)
https://doi.org/10.1140/epjd/e2011-20106-4

Regular Article

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 China, Hengyang 421001, P.R. China

^a e-mail: luxq@ipp.ac.cn

Received: 16 February 2011
Received in final form: 7 April 2011
Published online: 5 July 2011

Abstract

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 d_i. 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.