Hall magnetohydrodynamics in a strong magnetic field
Hall magnetohydrodynamics in a strong magnetic field
复制标题
强磁场中的霍尔磁流体动力学
DOI：
--
复制
发表时间：
2008
期刊：
影响因子：
--
通讯作者：
P. Dmitruk
中科院分区：
文献类型：
--
作者：
D. Gómez;S. Mahajan;P. Dmitruk
当等离子体处于强外磁场中时，其空间结构倾向于沿磁场方向而不是沿着平行方向形成精细尺度。这一功能，这使得一个主要的简化在理论结构的单流体磁流体力学（导致减少磁流体力学），利用这里导出可以被称为减少霍尔磁流体力学方程（RHMHD）反映两种流体的影响，如霍尔电流和电子压力。这些物理效应，这可能是相关的天体物理环境，也在融合等离子体，允许传播的圆偏振正常模式，如哨声和剪切/离子回旋波。本文对RHMHD方程组进行数值积分，研究外部驱动湍流。
For a plasma embedded in a strong external magnetic field, the spatial structures tend to develop fine scales preferentially across the field, rather than along the parallel direction. This feature, which allowed a major simplification in the theoretical structure of one-fluid magnetohydrodynamics (leading to reduced magnetohydrodynamics), is exploited here to derive what may be called the reduced Hall magnetohydrodynamic equations (RHMHD) reflecting two-fluid effects such as the Hall current and the electron pressure. These physical effects, which can be relevant in astrophysical environments and also in fusion plasmas, allow for the propagation of circularly polarized normal modes such as whistlers and shear/ion-cyclotron waves. In this paper, the RHMHD system of equations is integrated numerically, to investigate externally driven turbulence.