Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A numerical model to predict unsteady cavitating flow behaviour in
  inducer blade cascades   The cavitation behaviour of a four-blade rocket engine turbopump inducer is
simulated. A 2D numerical model of unsteady cavitation was applied to a blade
cascade drawn fromthe inducer geometry. The physical model is based on a
homogeneous approach of cavitation, coupled with a barotropic state law for the
liquid/vapour mixture. The numericalresolution uses a pressure-correction
method derived from the SIMPLE algorithm and a finite volume discretization.
Unsteadybehaviour of sheet cavities attached to the blade suction side depends
on the flow rate and cavitation number. Two differentunstable configurations of
rotating cavitation, respectively sub-synchronous and super-synchronous, are
identified. The mechanisms that are responsible for these unstable behaviours
are discussed, and the stress fluctuations induced on the blade by the rotating
cavitation are estimated.

32
The categories of this paper are: atom-ph
35
The categories of this paper are: mtrl-th
26
The categories of this paper are: bayes-an
10
The categories of this paper are: q-bio
28
The categories of this paper are: alg-geom
13
The categories of this paper are: quant-ph
33
The categories of this paper are: plasm-ph
5
The categories of this paper are: gr-qc
1
The categories of this paper are: cs
18
The categories of this paper are: econ
6
The categories of this paper are: astro-ph
14
The categories of this paper are: math-ph
12
The categories of this paper are: nucl-th
31
The categories of this paper are: ao-sci
4
The categories of this paper are: cond-mat
15
The categories of this paper are: nucl-ex