Abstract
Nonlinear motion of vortex sheets with non-uniform current is investigated using the vortex blob method. We show that the current induced on a vortex sheet leads to a strong amplification of the magnetic field when the Lorentz force term in the governing equation is sufficiently small. When the Lorentz force term is large, an oscillation due to the Alfvén wave appears and the nonlinear growth is suppressed. We present various interfacial profiles depending on the magnitude of the Atwood number (density ratio) and Lorentz force, and discuss the complicated motion of non-uniform current-vortex sheets.
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