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arXiv 1605.09151physics.plasm-ph
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二维电子速度剪切驱动的相对论不稳定性的粒子模拟

Particle-in-Cell simulation of two-dimensional electron velocity shear driven instability in relativistic domain

Chandrasekhar Shukla, Amita Das, Kartik Patel

摘要:

我们进行粒子在细胞(PIC)模拟研究与2-D剪切电子流配置对离子的中和背景下的不稳定性。弱和强相对论性的流速被认为是。在弱相对论的情况下,我们观察到的电磁Kelvin Helmholtz不稳定性的发展与电子磁流体动力学(EMHD)模型预测的相似的特性。另一方面,在强相对论性的情况下,电子流体的可压缩性效应占主导地位,并引入横向于流动的上混合静电振荡,这与EMHD流体行为非常不同。在非线性区,弱和强相对论性的情况下,导致湍流与广泛的幂律谱。

英文摘要:

We carry out Particle-in-Cell (PIC) simulations to study the instabilities associated with a 2-D sheared electron flow configuration against a neutralizing background of ions. Both weak and strong relativistic flow velocities are considered. In the weakly relativistic case, we observe the development of electromagnetic Kelvin Helmholtz instability with similar characteristics as that predicted by the electron Magnetohydrodynamic (EMHD) model. On other hand, in strong relativistic case the compressibility effects of electron fluid dominate and introduce upper hybrid electrostatic oscillations transverse to the flow which are very distinct from EMHD fluid behaviour. In the nonlinear regime, both weak and strong relativistic cases lead to turbulence with broad power law spectrum.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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