The two-fluid (ions and electrons) plasma Richtmyer-Meshkov instability of a cylindrical light-heavy density interface is numerically investigated without an initial magnetic field. Varying the Debye length scale, we examine the effects of the coupling between the electron and ion fluids. When the coupling becomes strong, the electrons are restricted to co-move with the ions and the resulting evolution is similar to the hydrodynamic neutral fluid case. The charge separation that occurs between the electrons and ions is responsible for the self-generated electromagnetic fields. We show that the Biermann battery effect dominates the generation of magnetic field when the coupling between the electrons and ions is weak. In addition to the Rayleigh-Taylor stabilization effect during flow deceleration, the interfaces are accelerated by the induced spatiotemporally varying Lorentz force. As a consequence, the perturbations develop into the Rayleigh-Taylor instability, leading to an enhancement of the perturbation amplitude compared with the hydrodynamic case.

中文翻译：

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两流体等离子体模型的内爆流的Richtmyer-Meshkov不稳定性

在没有初始磁场的情况下，数值研究了圆柱形轻重密度界面的两流体（离子和电子）等离子体Richtmyer-Meshkov不稳定性。改变德拜长度尺度，我们研究了电子和离子流体之间耦合的影响。当耦合变强时，电子被限制与离子共同移动，并且所产生的演化类似于流体动力学中性流体的情况。电子和离子之间发生的电荷分离是造成自生电磁场的原因。我们显示，当电子和离子之间的耦合较弱时，Biermann电池效应将主导磁场的产生。除了在减速时的瑞利-泰勒稳定作用外，通过诱导的时空变化的洛伦兹力来加速界面。结果，扰动发展为瑞利泰勒不稳定性，与流体动力情况相比，导致了扰动幅度的增加。