The evolutionary process of magnet ic reconnect ion under solar coronal conditions is investigated with our recently developed 2.5D adaptive mesh refinerment(AMR)resistive magneto hydrodynamics (MHD)model.We reveal th...The evolutionary process of magnet ic reconnect ion under solar coronal conditions is investigated with our recently developed 2.5D adaptive mesh refinerment(AMR)resistive magneto hydrodynamics (MHD)model.We reveal the successive fragmentation and merging of plasmoids in a long-thin current sheet with Lundquist nurmber Rm=5.0× 10^(4).It is found that several big magnetic islands are formed event ually,with many slow-mode shocks bounding around the outflow regions.The multi-scale hier archicallike struct ures of the magnetic reconnect ion are well resolved by the model and the AMR technique of the model can capture many fine pictures(e.g,the near-singular difusion regions)of the development and simultaneously it can save a great deal of computing resources.展开更多
基金By the National Natural Science Foundation of China under Grant Nos 41031066,40921063,40874091,40890162,41074122 and 40536029the National Basic Research Program of China under Grant No 2006CB806304the Specialized Research Fund for State Key Laboratories。
文摘The evolutionary process of magnet ic reconnect ion under solar coronal conditions is investigated with our recently developed 2.5D adaptive mesh refinerment(AMR)resistive magneto hydrodynamics (MHD)model.We reveal the successive fragmentation and merging of plasmoids in a long-thin current sheet with Lundquist nurmber Rm=5.0× 10^(4).It is found that several big magnetic islands are formed event ually,with many slow-mode shocks bounding around the outflow regions.The multi-scale hier archicallike struct ures of the magnetic reconnect ion are well resolved by the model and the AMR technique of the model can capture many fine pictures(e.g,the near-singular difusion regions)of the development and simultaneously it can save a great deal of computing resources.
