Numerical simulations of the ionospheric striation model in a non-uniform magnetic field

作者：Besse Christophe; Claudel Jean; Degond Pierre^*; Deluzet Fabrice; Gallice Gerard; Tessieras Christian

来源：Computer Physics Communications, 2007, 176(2): 75-90.

DOI：10.1016/j.cpc.2006.07.022

• ionospheric plasma
• striation model
• striations
• three-dimensional simulations
• Euler potentials
• numerical methods

The striation model describes the evolution of plasma clouds along and across the geomagnetic field B in the earth ionosphere. The plasma clouds drift across the ionosphere in the presence of an ambient electric field and a neutral wind. In this article we introduce new techniques to extend the simulation tools to the earth magnetic field geometry. The model moreover allows a three-dimensional representation of the plasma density evolution. The derivation of this model is recalled in the context of a non-uniform magnetic field and involves a new set of local coordinates. A numerical scheme is proposed to solve the resulting system of nonlinear partial differential equations. Numerical simulations are realized and the striation of the initial plasma cloud into a cluster of smaller clouds is obtained. The present work allows the observation of the structures along the magnetic field lines.

• 出版日期2007-1-15
• 单位中国地震局