Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A BGK model for high temperature rarefied gas flows   High temperature gases, for instance in hypersonic reentry flows, show
complex phenomena like excitation of rotational and vibrational energy modes,
and even chemical reactions. For flows in the continuous regime, simulation
codes use analytic or tabulated constitutive laws for pressure and temperature.
In this paper, we propose a BGK model which is consistent with any arbitrary
constitutive laws, and which is designed to make high temperature gas flow
simulations in the rarefied regime. A Chapman-Enskog analysis gives the
corresponding transport coefficients. Our approach is illustrated by a
numerical comparison with a compressible Navier-Stokes solver with rotational
and vibrational non equilibrium. The BGK approach gives a deterministic solver
with a computational cost which is close to that of a simple monoatomic gas.

31
The categories of this paper are: ao-sci
19
The categories of this paper are: eess
6
The categories of this paper are: astro-ph
21
The categories of this paper are: adap-org
11
The categories of this paper are: hep-lat
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: dg-ga
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The categories of this paper are: alg-geom
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The categories of this paper are: plasm-ph
8
The categories of this paper are: hep-ex
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The categories of this paper are: bayes-an
20
The categories of this paper are: acc-phys
14
The categories of this paper are: math-ph
35
The categories of this paper are: mtrl-th
12
The categories of this paper are: nucl-th