Impact of a shear flow on double tearing nonlinear dynamics

T. Voslion, O. Agullo, P. Beyer, M. Yagi, S. Benkadda, X. Garbet, K. Itoh, S. I. Itoh

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Abstract

The dynamics of global reconnection in the presence of a poloidal shear flow located in between magnetic islands is investigated. Different linear and nonlinear regimes are identified depending on the resistivity, the equilibrium velocity amplitude, and the distance between the low-order resonant surfaces. It is found that nonlinearly, the shear flow can significantly delay DTM generation and global reconnection. It is shown that this delay is linked to a symmetry breaking imposed by the shear flow and the generation of mean poloidal flows in the resistive layers. It is also found that turbulence can be generated by Kelvin-Helmholtz instability in between the resonance layers and enhance magnetic reconnection processes.

Original languageEnglish
Article number062302
JournalPhysics of Plasmas
Volume18
Issue number6
DOIs
Publication statusPublished - Jun 1 2011

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

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    Voslion, T., Agullo, O., Beyer, P., Yagi, M., Benkadda, S., Garbet, X., Itoh, K., & Itoh, S. I. (2011). Impact of a shear flow on double tearing nonlinear dynamics. Physics of Plasmas, 18(6), [062302]. https://doi.org/10.1063/1.3592988