剪切流动和电阻撕裂模的相互作用

本文在细长柱位形下数值研究了具有剪切流动的电流片中电阻撕裂模不稳定性的非线性演化。结果表明，电流片附近Ｓｅｃｈ形式的剪切流动，将导致电阻撕裂模不稳定性的发展，且不稳定性增长率随着剪切参数Ｒｒ的增加而增长，导致磁岛的形成和快速的磁能释放。这种剪切流动和撕裂模的耦合过程以及超热不稳定性的相互作用，改变了磁拱中的磁场剪切强度或者说电流密度梯度，从而驱动电阻撕裂模不稳定性的发展，这种过程对于等离子体电流密

INTERACTION BETWEEN THE SHEARED FLOW AND THE RESISTIVE TEARING MODE

In this paper, the nonlinear evolution of the resistive tearing instability in the current with a sheared flow for a thin and long cylindrical configuration is studied numerically. The results show that the sheared flow with a Seth form in the current enhances the development of resistive tearing mode, the growth rate of instability increases as the sheared parameter Rr increases, and this process may be a trigger of the solar flare.