Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Turbophoresis in forced inhomogeneous turbulence   We show, by direct numerical simulations, that heavy inertial particles
(characterized by Stokes number $\St$) in inhomogeneously forced statistically
stationary isothermal turbulent flows cluster at the minima of mean-square
turbulent velocity. Two turbulent transport processes, turbophoresis and
turbulent diffusion together determine the spatial distribution of the
particles. If the turbulent diffusivity is assumed to scale with turbulent root
mean square velocity, as is the case for homogeneous turbulence, the
turbophoretic coefficient can be calculated. Indeed, for the above assumption,
the non-dimensional product of the turbophoretic coefficient and the rms
velocity is shown to increase with $St$ for small $St$, reach a maxima for
$St\approx 10$ and decrease as $\sim St^{-0.33}$ for large $St$.

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The categories of this paper are: nlin
35
The categories of this paper are: mtrl-th
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The categories of this paper are: cmp-lg
34
The categories of this paper are: chem-ph
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The categories of this paper are: hep-lat
10
The categories of this paper are: q-bio
27
The categories of this paper are: comp-gas
4
The categories of this paper are: cond-mat
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The categories of this paper are: acc-phys
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The categories of this paper are: bayes-an
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The categories of this paper are: quant-ph
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The categories of this paper are: astro-ph
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The categories of this paper are: math-ph
28
The categories of this paper are: alg-geom
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The categories of this paper are: hep-ex
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The categories of this paper are: nucl-th