Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Early-time interface instabilities in high intensity aero-breakup of
  liquid drop   The early-time interface instabilities in high intensity (high Weber number
and high Reynolds number) aero-breakup of a liquid drop are investigated by
numerical simulations. A combined analysis based on simulation results and
linear-instability theory show that both RT (Rayleigh-Taylor) and KH
(Kelvin-Helmholtz) instabilities contributes the dominant disturbances
originate from about the half way from the stagnation point to the equator.
This is verified further with a specially modified simulation, which decreases
the effect of KH instability while keeps other flow properties unchanged.

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The categories of this paper are: econ
11
The categories of this paper are: hep-lat
15
The categories of this paper are: nucl-ex
31
The categories of this paper are: ao-sci
25
The categories of this paper are: patt-sol
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The categories of this paper are: chao-dyn
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The categories of this paper are: bayes-an
5
The categories of this paper are: gr-qc
4
The categories of this paper are: cond-mat
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The categories of this paper are: alg-geom
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The categories of this paper are: atom-ph
0
The categories of this paper are: hep-ph
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The categories of this paper are: eess
34
The categories of this paper are: chem-ph
9
The categories of this paper are: nlin
33
The categories of this paper are: plasm-ph