## 摘要

A general formulation is presented for steady field-aligned magnetohydrodynamic (MHD) equilibrium flows with isotropic or gyrotropic pressures. Closure to the anisotropic MHD model is provided by a pair of double-polytropic energy equations, for which double-adiabatic and double-isothermal conditions are special limits of the model. For the latter case, a MHD counterpart of Bernoulli's equation is derived. The study is then focused on the two-dimensional (∂l∂y=0 but B_{y} ≠0) problems, for which a generalized Grad-Shafranov equation is developed for field-aligned MHD flow equilibria with isotropic or gyrotropic pressures. The formulation is put in a form that allows self-consistent solutions to be constructed numerically in a way similar to the static case: examples of such MHD equilibria are shown. An asymptotic formulation is also developed for stretched gyrotropic plasma configurations, which, however, is not applicable to two-dimensional planar configurations with regions of weak magnetic field strength, such as the geomagnetic tail.

原文 | ???core.languages.en_GB??? |
---|---|

頁（從 - 到） | 1113-1119 |

頁數 | 7 |

期刊 | Physics of Plasmas |

卷 | 3 |

發行號 | 3 |

DOIs | |

出版狀態 | 已出版 - 3月 1996 |