Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Critical velocities for deflagration and detonation triggered by voids
  in a REBO high explosive   The effects of circular voids on the shock sensitivity of a two-dimensional
model high explosive crystal are considered. We simulate a piston impact using
molecular dynamics simulations with a Reactive Empirical Bond Order (REBO)
model potential for a sub-micron, sub-ns exothermic reaction in a diatomic
molecular solid. The probability of initiating chemical reactions is found to
rise more suddenly with increasing piston velocity for larger voids that
collapse more deterministically. A void with radius as small as 10 nm reduces
the minimum initiating velocity by a factor of 4.

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The categories of this paper are: adap-org
30
The categories of this paper are: q-alg
6
The categories of this paper are: astro-ph
33
The categories of this paper are: plasm-ph
5
The categories of this paper are: gr-qc
24
The categories of this paper are: dg-ga
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The categories of this paper are: comp-gas
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The categories of this paper are: nucl-ex
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The categories of this paper are: eess
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The categories of this paper are: q-fin
2
The categories of this paper are: math
29
The categories of this paper are: funct-an
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The categories of this paper are: chao-dyn
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The categories of this paper are: econ
36
The categories of this paper are: cmp-lg
9
The categories of this paper are: nlin