The effect of anisotropic viscosity on the nonlinear MHD kink instability
The effect of anisotropic viscosity on the nonlinear MHD kink instability
复制标题
各向异性粘度对非线性 MHD 扭结不稳定性的影响
DOI:
10.1016/j.cnsns.2019.105131
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发表时间:
2020
影响因子:
3.9
通讯作者:
Quinn J
中科院分区:
文献类型:
--
作者:
Quinn J
The kink instability of magnetohydrodynamics is believed to be fundamental to many aspects of the dynamic activity of the solar atmosphere, such as the initiation of flares and the heating of the solar corona. In this work, we investigate the importance of viscosity on the kink instability. In particular, we focus on two forms of viscosity; isotropic viscosity (independent of the magnetic field) and anisotropic viscosity (with a preferred direction following the magnetic field). Through the detailed analysis of magnetohydrodynamic simulations of the kink instability with both types of viscosity, we show that the form of viscosity has a significant effect on the nonlinear dynamics of the instability. The different viscosities allow for different flow and current structures to develop, thus affecting the behaviour of magnetic relaxation, the formation of secondary instabilities and the Ohmic and viscous heating produced. Our results have important consequences for the interpretation of solar observations of the kink instability.
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影响因子:
--
作者:
J. V. Hollweg
通讯作者:
J. V. Hollweg
DOI:
--
发表时间:
1995
期刊:
影响因子:
--
作者:
R. Erdélyi;M. Goossens
通讯作者:
M. Goossens
影响因子:
2.8
作者:
C. Armstrong;I. Craig
通讯作者:
C. Armstrong;I. Craig
影响因子:
2.5
作者:
C. Ryu;R. Grimm
通讯作者:
R. Grimm
DOI:
--
发表时间:
2019
期刊:
影响因子:
--
作者:
T. Arber;K. Bennett;C. Brady;J. Quinn
通讯作者:
J. Quinn