Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Mechanism for Sequestering Magnetic Energy at Large Scales in Shear-Flow
  Turbulence   Straining of magnetic fields by large-scale shear flow, generally assumed to
lead to intensification and generation of small scales, is re-examined in light
of the persistent observation of large-scale magnetic fields in astrophysics.
It is shown that in magnetohydrodynamic turbulence, unstable shear flows have
the unexpected effect of sequestering magnetic energy at large scales, due to
counteracting straining motion of nonlinearly excited large-scale stable
eigenmodes. This effect is quantified via dissipation rates, energy transfer
rates, and visualizations of magnetic field evolution by artificially removing
the stable modes.

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The categories of this paper are: hep-lat
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The categories of this paper are: cond-mat
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The categories of this paper are: eess
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The categories of this paper are: gr-qc
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The categories of this paper are: atom-ph
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The categories of this paper are: hep-ex
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The categories of this paper are: supr-con
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The categories of this paper are: alg-geom
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The categories of this paper are: nucl-th
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The categories of this paper are: solv-int
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The categories of this paper are: cmp-lg
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The categories of this paper are: quant-ph
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The categories of this paper are: comp-gas
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The categories of this paper are: econ
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The categories of this paper are: ao-sci
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The categories of this paper are: funct-an