A study of shear flows induced by nonlinear evolution of double tearing modes in Hall magnetohydrodynamics

• Published in: The European physical journal. D, Atomic, molecular, and optical physics Vol. 64; no. 2-3; pp. 365 - 368
• Main Authors: Li, X. X., Lu, X. Q., Gong, X. Y., Huang, Q. H.
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer-Verlag 01.10.2011; EDP Sciences
• Subjects: Applications of Nonlinear Dynamics and Chaos Theory; Atomic; Computational fluid dynamics; Evolution; Exact sciences and technology; Fluid flow; Magnetic confinement and equilibrium; Magnetohydrodynamics; Magnetohydrodynamics (including electron magnetohydrodynamics); Molecular; Nonlinearity; Optical and Plasma Physics; Physical Chemistry; Physics; Physics and Astronomy; Physics of gases, plasmas and electric discharges; Physics of plasmas and electric discharges; Plasma dynamics and flow; Plasma macroinstabilities (magnetohydrodynamic, e.g., kink, fire-hose, mirror, ballooning, tearing, trapped-particle, flute, rayleigh-taylor, etc.); Plasma properties; Quantum Information Technology; Quantum Physics; Regular Article; Shear flow; Spectroscopy/Spectrometry; Spintronics; Tearing; Tokamak devices; Tokamaks; Transport properties; Waves, oscillations, and instabilities in plasmas and intense beams; Current Sheet; Zmax; Nonlinear Evolution; Magnetic Reconnection; Magnetic Island; Tokamak; Magnetic reconnection; Plasma instability; Current layers; Plasma flow; Shear flow; Tearing instability; Magnetic islands; Plasma magnetohydrodynamics; Confined plasma; Hall effect; Plasma macroinstabilities
• ISSN: 1434-6060; 1434-6079
• DOI: 10.1140/epjd/e2011-20106-4

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.