JpGU-AGU Joint Meeting 2017

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[JJ] Poster

P (Space and Planetary Sciences) » P-EM Solar-Terrestrial Sciences, Space Electromagnetism & Space Environment

[P-EM21] [JJ] Space Plasma Physics: Theory and Simulation

Thu. May 25, 2017 1:45 PM - 3:15 PM Poster Hall (International Exhibition Hall HALL7)

convener:Takayuki Umeda(Institute for Space-Earth Environmental Research, Nagoya University), Yasuhiro Nariyuki(Faculty of Human Development, University of Toyama), Yohei Miyake(Education Center on Computational Science and Engineering, Kobe University), Tadas Nakamura(Fukui Prefectural University)

[PEM21-P01] Fast magnetic reconnection onset for different equilibrium configurations: from analytical results to 3D simulations

*Fulvia Pucci1, Marco Velli 2, Ganapati Sahoo3, Anna Tenerani2, Luca Biferale3 (1.National Institute for Fusion Science (NIFS), 2.UCLA , 3.UNITOV)

Keywords:plasma physics, space plasma, magnetic reconnection

We investigate the onset of fast magnetic reconnection starting from equilibrium configurations relevant for astrophysical as well as for laboratory plasmas, that differ from the simple Harris current sheet configuration. In particular we present an analytical as well as a numerical study of the linear instability for equilibrium magnetic fields which go to zero at the boundary of the domain and of a double current sheet system, the latter previously studied as a proxy for the m=1 kink mode in cylindrical plasma. We show how the "ideal" tearing trigger condition is changed by assuming such different equilibrium profiles. Finally we present results for incompressible 3D MHD simulations of a double current sheet, in triperiodic geometry. We examine and contrast the destabilization and transition to turbulence describing the evolution of the magnetic energy and dissipation, and possible application to heliospheric phenomena, in particular CME evolution and relaxation.