Multidimensional, magnetohydrodynamic simulation of solar-generated disturbances: space weather forecasting of geomagnetic storms.
Multidimensional, magnetohydrodynamic simulation of solar-generated disturbances: space weather forecasting of geomagnetic storms.
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作者：
M. Dryer
首先，对经典连续介质气体动力学在稳态和瞬态环境下向太阳系磁流体动力学 (MHD) 的扩展进行了简短回顾。对太阳系内部瞬态太阳产生扰动的二维和三维数值 MHD 模拟进行了稍长的回顾。通过使用几个示例来验证该方法，其中激波形状和高能粒子通量（由激波产生）是根据经验确认的。尽管这些研究基于理想的单流体（质子）等离子体，但我们建议采用三维 MHD 模型来利用目前可用的太阳观测结果作为初始化条件的近似物理参数。在空间天气国家实施计划中，这样的模型对于地磁风暴预报可能很有用。
A short review is given, first, of an extension of classical, continuum gasdynamics to solar system magnetohy-drodynamics (MHD) in both the steady and time-dependent contexts. A slightly longer review is given of two-and three-dimenslonal, numerical, MHD simulations of transient, solar-generated disturbances in the inner solar system. Validation of this approach is provided by making use of several examples wherein shock shapes and energetic particle fluxes (generated by shocks) are empirically confirmed. Although these studies are based on an ideal, one-fluid (proton) plasma, we suggest that a three-dimensional MHD model be employed to make use of presently available solar observations as approximate physical parameters for initialization conditions. Such a model may be useful, within the space weather national implementation plan, for geomagnetic storm forecasts.