Toward New Phase of Collisionless Driven Reconnection Studies with Multi-Hierarchy Simulation

Submitted for the DPP11 Meeting of The American Physical Society Toward New Phase of Collisionless Driven Reconnection Studies with Multi-Hierarchy Simulation SHUNSUKE USAMI, HIROAKI OHTANI, RITOKU HORIUCHI, National Institute for Fusion Science, MITSUE DEN, National Institute of Information and Communications Technology — For comprehension of magnetic reconnection as a multi-hierarchy phenomenon, we have developed a multi-hierarchy simulation model which solves macroscopic and microscopic physics simultaneously and self-consistently. In our multi-hierarchy model, the simulation domain is divided into macroand micro-hierarchies. The physics in the macrohierarchy is calculated by the MHD algorithm, and the dynamics in the microhierarchy is expressed by the PIC algorithm. Between two hierarchies, the interface domain is inserted, where physical quantities in the macroand micro-hierarchies are exchanged. In 2009, using the multi-hierarchy model with periodic condition in the downstream direction, we succeeded in the demonstration of multi-hierarchy simulation of magnetic reconnection. We confirmed that reconnection found in our model exhibit true physics, by comparing it with pure PIC simulation results. Recently we have improved our multi-hierarchy model where open boundary condition is applied in the downstream direction. Reconnection is driven in the same way as the first model. Furthermore, we are creating a model that calculation algorithm is automatically converted from MHD to PIC, vice versa, as reconnection system evolves dynamically. Shunsuke Usami National Institute for Fusion Science Date submitted: 15 Jul 2011 Electronic form version 1.4