Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Influence of Friction on the Direct Cascade of the 2d Forced Turbulence   We discuss two possible scenario for the direct cascade in two dimensional
turbulent systems in presence of friction which differ by the presence or not
of enstrophy dissipation in the inviscid limit.They are distinguished by the
existence or not of a constant enstrophy transfer and by the presence of
leading anomalous scaling in the velocity three point functions. We also point
out that the velocity statistics become gaussian in the approximation
consisting in neglecting odd order correlations in front even order ones.

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The categories of this paper are: q-bio
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The categories of this paper are: patt-sol
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The categories of this paper are: acc-phys
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The categories of this paper are: hep-ex
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The categories of this paper are: stat
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The categories of this paper are: gr-qc
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The categories of this paper are: eess
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The categories of this paper are: solv-int
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The categories of this paper are: hep-ph
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The categories of this paper are: funct-an
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The categories of this paper are: cmp-lg
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The categories of this paper are: mtrl-th
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The categories of this paper are: plasm-ph
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The categories of this paper are: nucl-th
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The categories of this paper are: alg-geom
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The categories of this paper are: dg-ga