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Three-dimensional hybrid simulation of magnetized plasma flow around an obstacle

机译:障碍物周围磁化等离子体流的三维混合模拟

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The interaction between the magnetized plasma flow and an obstacle was investigated in the computer simulations described here by using a three-dimensional hybrid code (kinetic ions and massless fluid electrons). The results, which are relevant to the interaction between the solar wind and an unmagnetized planet (Venus or Mars), show that fundamental structures (bow shock and magnetotail) are formed. When a reflecting boundary is used at the obstacle, the magnetic field configuration was clearly asymmetrical in the direction of the convection electric field. This asymmetry is a result of differences in ion acceleration due to the convection electric field. Asymmetry is also evident when the size of the obstacle is close to the Larmor radius of protons. The shock of a smaller obstacle is weaker than that of a larger obstacle, but the shock size is almost independent of the obstacle size.
机译:在这里描述的计算机模拟中,通过使用三维混合代码(动力学离子和无质量流体电子)研究了磁化等离子体流和障碍物之间的相互作用。结果与太阳风和未磁化行星(金星或火星)之间的相互作用有关,表明形成了基本结构(弓形冲击和磁尾)。当在障碍物处使用反射边界时,磁场结构在对流电场方向上明显不对称。这种不对称性是由于对流电场引起的离子加速度差异的结果。当障碍物的大小接近质子的拉莫尔半径时,不对称性也很明显。较小障碍物的冲击要弱于较大障碍物,但是冲击大小几乎与障碍物大小无关。

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