Japan Geoscience Union Meeting 2014

Presentation information

Oral

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

[P-EM32_2AM2] Plasma Astrophysics: MHD phenomenon, magnetic reconnection, structure formation

Fri. May 2, 2014 11:00 AM - 12:45 PM 503 (5F)

Convener:*Shuichi Matsukiyo(Department of Earth System Science and Technology, Kyushu University), Shin-ya Nitta(National University Corporation Tsukuba University of Technology), Chair:Masahiro Hoshino(Graduate School of Science, The University of Tokyo)

12:30 PM - 12:45 PM

[PEM32-13] Analysis on turbulent reconnection of three-dimensional resistive MHD simulation

*Shuoyang WANG1, Takaaki YOKOYAMA1, Hiroaki ISOBE2 (1.The University of Tokyo, 2.Kyoto University)

This study starts from a three-dimensional current sheet with random perturbation on velocity, in order to understand more on the 3D reconnection in a more general way.Due to the periodic boundary condition, the core of current sheet quickly develops a resonance netlike pattern under tearing instability. Small reconnection site mainly form two chains on either side of the current sheet center and constitute a zigzag arrangement. The outflow from one reconnection site is fed into the counterpart on the other side thus composes a positive feedback system resembles even double tearing mode. As the inflow being enhanced, slow-mode shocks are identified along the current sheet. The conversion of the magnetic energy is further raised. Total kinetic energy of the current sheet presents 4 steps of development while first 3 exhibit linear growing tendency. At the same time, reconnection rate increases by 5 times compared with the early phase. Thus we have achieved faster reconnection without localized resistivity in a more universal idea.