Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Laval Turbonozzle Dynamics   The results of computing experiments are presented for the steam and gas
stream motion in converging-diverging flow element called Laval nozzle and
applied in steam and gas turbines. In beginning the experiments had carried out
for Laval nozzle tested by Stodola and then for this turbonozzle various
modifications. Quantitative evaluation of the state and motion parameters of
the viscous compressible fluid and the metering characteristics of the flow
elements are given as well as physically adequate interpretation of the
obtained results is presented at the first time. The computing experiments are
carried out by means of VeriGas program-modeler composed on the base of a new
approach to the classical physics development in field of fluid motion.

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The categories of this paper are: cond-mat
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The categories of this paper are: hep-ex
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The categories of this paper are: astro-ph
25
The categories of this paper are: patt-sol
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The categories of this paper are: adap-org
23
The categories of this paper are: solv-int
36
The categories of this paper are: cmp-lg
29
The categories of this paper are: funct-an
18
The categories of this paper are: econ
34
The categories of this paper are: chem-ph
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The categories of this paper are: nlin
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The categories of this paper are: cs
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The categories of this paper are: hep-th
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The categories of this paper are: ao-sci
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The categories of this paper are: math-ph
24
The categories of this paper are: dg-ga