Numerical simulations of a dust grain in a flowing magnetized plasma

被引:18
作者
Darian, D. [1 ]
Miloch, W. J. [2 ]
Mortensen, M. [1 ]
Miyake, Y. [3 ]
Usui, H. [3 ]
机构
[1] Univ Oslo, Dept Math, Postboks 1053 Blindern, N-0316 Oslo, Norway
[2] Univ Oslo, Dept Phys, Postboks 1048 Blindern, N-0317 Oslo, Norway
[3] Kobe Univ, Dept Computat Sci, Nada Ku, 1-1 Rokkodai Cho, Kobe, Hyogo 6578501, Japan
关键词
ATTRACTIVE FORCES; INSTABILITY; PARTICLES; CRYSTAL;
D O I
10.1063/1.5089631
中图分类号
O35 [流体力学]; O53 [等离子体物理学];
学科分类号
070204 ; 080103 ; 080704 ;
摘要
The effect of an external magnetic field on the formation of the wake in the potential distribution behind a dust grain is studied with self-consistent Particle-In-Cell numerical simulations. The collisionless plasma flow is aligned with the magnetic field. It is demonstrated that the topology of the wakefield is significantly affected by the magnetization degree of plasma and by the ion flow speed. The external magnetic field acts to reduce the potential enhancements in the wake and leads to splitting of the wake pattern across the symmetry axis. For high ion flow speeds, a strong magnetization of plasma suppresses the potential enhancements and results in a narrow negative potential line along the symmetry axis, parallel to the ion flow direction, in the wake. Published under license by AIP Publishing.
引用
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页数:14
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