c/u_A及m_i/m_e取值对于磁重联过程的影响

Influences of c/u_A and m_i/m_e on Magnetic Reconnection Process

构造控制电磁场散度误差的有限差分方法,该方法结构简单,可将电磁场散度误差控制在舍入误差量级.该方法应用到GEM,得到的结果与已发表文献类似.研究双流体模型中可调参数光速和离子与电子的质量比对磁重联过程的影响.结果表明:光速增加后,净电荷的积累减少,而重联率几乎不变.离子与电子质量比增加导致电流片变薄,从而使得重联加快.

A finite difference scheme to control divergence error of electromagnetic field is proposed to study magnetic reconnection.With this simple numerical scheme,divergence errors of electromagnetic field are limited in the magnitude of rounding error.Our results are in good agreement with that in GEM.Influences of c/u_A and m_i/m_e on magnetic reconnection are also studied.It indicated that with the increase of c/u_A,net charge densities decrease while reconnection rate remains almost unchanged.The increase of m_i/m_e could lead to current sheet thinning and acceleration of reconnection.