Comparative Study of Effective Resistivity Models Evaluated in Kinetic Studies Using MHD Simulation

Abstract:

We propose effective resistivity models evaluated in study of the anomalous resistivity induced in the instability occurring during the wave particle interaction in microscopic approach and of steady collisionless driven reconnection resistivity model. It is well known that magnetic reconnection plays important role in space plasma phenomena such as substorm in earth magnetoshere. The magnetohydrodynamic (MHD) approach has been used for studies of that phenomenon, in which some traditional models for a resistivity with the assumption of dependence of current or magnetic field, or with no physical reason are adopted for MHD simulations of magnetic reconnection. Moritaka and Horiuchi (2008) obtained the anomalous resistivity model based on the wave-particle interaction by using two dimensional (2D) particle in cell (PIC) simulation. We carry out substorm simulation using a global MHD code with the effective resistivity model evaluated in their study. We notice that “time dependence of a coefficient” is taken into account when applying this model to the investigation in MHD framework. In this work, we compare two kind of effective resistivity models, the one based on the wave particle interaction and the other based on steady collisionless driven reconnection (Horiuchi and Den, et al. 2013) by reproducing substom phenomena with 3D global MHD simulations.