Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Flute and kink instabilities in a dynamically twisted flux tube with
  anisotropic plasma viscosity   Magnetic flux tubes such as those in the solar corona are subject to a number
of instabilities. Important among them is the kink instability which plays a
central part in the nanoflare theory of coronal heating, and for this reason in
numerical simulations it is usually induced by tightly-controlled perturbations
and studied in isolation. In contrast, we find that when disturbances are
introduced in our magnetohydrodynamic flux tube simulations by dynamic twisting
of the flow at the boundaries fluting modes of instability are readily excited.
We also find that the flute instability, which has been theorised but rarely
observed in the coronal context, is strongly enhanced when plasma viscosity is
assumed anisotropic. We proceed to investigate the co-existence and competition
between flute and kink instabilities for a range of values of the resistivity
and of the parameters of the anisotropic and isotropic models of viscosity. We
conclude that while the flute instability cannot prevent the kink from
ultimately dominating, it can significantly delay its development especially at
strong viscous anisotropy induced by intense magnetic fields.

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The categories of this paper are: hep-ph
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The categories of this paper are: cond-mat
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The categories of this paper are: q-fin
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The categories of this paper are: bayes-an
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The categories of this paper are: math-ph
35
The categories of this paper are: mtrl-th
32
The categories of this paper are: atom-ph
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The categories of this paper are: acc-phys
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The categories of this paper are: stat
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The categories of this paper are: nucl-ex
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The categories of this paper are: chao-dyn
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The categories of this paper are: alg-geom
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The categories of this paper are: dg-ga
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The categories of this paper are: econ
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The categories of this paper are: quant-ph
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The categories of this paper are: comp-gas