Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Radiation Hydrodynamics Scaling Laws in High Energy Density Physics and
  Laboratory Astrophysics   In this paper, radiating fluids scaling laws are studied. We focus on
optically thin and optically thick regimes which are relevant for both
astrophysics and laboratory experiments. By using homothetic Lie groups, we
obtain the scaling laws, the similarity properties and the number of free
parameters which allow to rescale experiments in the two astrophyscial
situations.

1
The categories of this paper are: cs
27
The categories of this paper are: comp-gas
18
The categories of this paper are: econ
12
The categories of this paper are: nucl-th
4
The categories of this paper are: cond-mat
34
The categories of this paper are: chem-ph
35
The categories of this paper are: mtrl-th
11
The categories of this paper are: hep-lat
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The categories of this paper are: q-bio
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The categories of this paper are: hep-ex
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The categories of this paper are: math-ph
20
The categories of this paper are: acc-phys
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The categories of this paper are: q-fin
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The categories of this paper are: adap-org
5
The categories of this paper are: gr-qc
37
The categories of this paper are: supr-con