论文标题
无碰撞各向异性空间等离子体的开尔文 - 霍尔姆霍尔兹不稳定
Kelvin-Helmholtz instability of the collisionless anisotropic space plasma
论文作者
论文摘要
详细检查了各向异性等离子体中有关外部磁场方向的线性MHD Kelvin-Helmholtz不稳定性（KHI）。为此，使用MHD方程来描述等离子体作为流体的运动，该血浆来自Boltzmann-Vlasov动力学方程的16矩，用于无碰撞等离子体。另外，考虑沿磁场的热通量。 KHI的增长速率被计算为沿超音速速度沿磁场的剪切流的各向异性等离子体特性的功能。另一方面，对具有不同速度的流量之间的表面波的准横向传播进行了零宽度和有限宽度过渡层的彻底检查。与切向不连续性相反，事实证明，过渡层的限制宽度会随着波数生长的增长而限制了KHI激发。所研究的不稳定性可能是太阳风等离子体中存在的大型低频Alfén波湍流的耗散方法之一。
The linear MHD Kelvin-Helmholtz instability (KHI) in an anisotropic plasma concerning the direction of an external magnetic field is examined in detail. For this purpose, the MHD equations are used to describe the motion of plasma as a fluid, which is derived from 16 moments of Boltzmann-Vlasov kinetic equations for collisionless plasma. In addition, the heat flux along the magnetic field is taken into account. The growing rates of KHI are calculated as functions of the anisotropic plasma properties for a shear flow along the magnetic field at supersonic velocities. On the other hand, the quasi-transverse propagation of surface waves between flows with varying velocities is thoroughly examined for both zero-width and finite-width transition layers. In contrast to the tangential discontinuity, it is proved that the limiting breadth of the transition layer constrains the KHI excitation as the wavenumber grows. The instability under investigation could be one of the main ways of dissipation of large-scale low-frequency Alfén wave turbulence existing in the solar wind plasma.
