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arXiv 1911.04028physics.plasm-phphysics.comp-ph
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粘阻区内扭结模的模拟

Simulation of the internal kink mode in visco-resistive regimes

Jervis Mendonca, Debasis Chandra, Abhijit Sen, Anantanarayanan Thyagaraja

摘要:

本文给出了在各种平衡等离子体流中(1,1)内扭结模非线性演化的数值模拟结果。目前的研究是在一个双流体模型的框架下进行的,以扩展我们过去的调查与减少磁流体动力学(RMHD)模型。双流体效应被发现显着影响的模式动力学在许多不同的方式。在线性区域中,抗磁效应与流动相结合提供了一种协同稳定的影响,这种影响也延续到非线性区域。此外,观察到新的对称性破缺现象的线性增长率,以及在非线性饱和状态的模式。我们的研究还探讨了强粘性对模式演化的影响,并发现有趣的修改的实际频率的模式中的线性制度。

英文摘要:

We present numerical simulation results of the nonlinear evolution of the (1,1) internal kink mode in the presence of various kinds of equilibrium plasma flows. The present studies are carried out in the framework of a two fluid model to extend our past investigations done with a reduced magneto-hydrodynamic (RMHD) model. Two-fluid effects are found to significantly influence the mode dynamics in a number of different ways. In the linear regime diamagnetic effects in combination with flows provide a synergistic stabilizing influence that also carries over to the nonlinear regime. In addition one observes novel symmetry breaking phenomena in the linear growth rates as well as in the nonlinear saturated states of the mode. Our study also explores the influence of strong viscosity on the mode evolution and finds interesting modifications in the real frequency of the mode in the linear regime.

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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