Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Fractional Hydrodynamic Equations for Fractal Media   We use the fractional integrals in order to describe dynamical processes in
the fractal media. We consider the "fractional" continuous medium model for the
fractal media and derive the fractional generalization of the equations of
balance of mass density, momentum density, and internal energy. The fractional
generalization of Navier-Stokes and Euler equations are considered. We derive
the equilibrium equation for fractal media. The sound waves in the continuous
medium model for fractional media are considered.

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The categories of this paper are: hep-ex
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The categories of this paper are: acc-phys
27
The categories of this paper are: comp-gas
26
The categories of this paper are: bayes-an
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The categories of this paper are: eess
33
The categories of this paper are: plasm-ph
29
The categories of this paper are: funct-an
22
The categories of this paper are: chao-dyn
28
The categories of this paper are: alg-geom
34
The categories of this paper are: chem-ph
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The categories of this paper are: patt-sol
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The categories of this paper are: gr-qc
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The categories of this paper are: hep-lat
23
The categories of this paper are: solv-int
36
The categories of this paper are: cmp-lg
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The categories of this paper are: stat