Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Investigation of cloud cavitation passive control method for hydrofoils
  using Cavitating-bubble Generators (CGs)   In this article, we propose a passive method to control unsteady cloud
cavitation on hydrofoils using cavitation-bubble generator (CGs). This method
may be used in many engineering applications, in particular in marine and
turbomachinery. First, we used a Partially-averaged Navier Stokes (PANS) model
for turbulence to simulate the unsteady cavitating flow and validated it based
on experimental data. This model was coupled with a mass transfer model and
implemented to the open source software package OpenFOAM. Second, the effect of
a proper design of CGs on qualitative parameters such as cavitation structure
and the shape of cavity were studied. The effect of CGs on the destructive
effects of cavitation such as vibration, turbulent velocity fluctuations and
high- pressure amplitude were analyzed. Our results showed that a proper design
of CGs may reduce the amplitude of the force fluctuations on the hydrofoil
substantially. Further on, the local boundary layer around the hydrofoil
surface was altered and the turbulent velocity fluctuation was reduced
significantly using this technique.

18
The categories of this paper are: econ
4
The categories of this paper are: cond-mat
0
The categories of this paper are: hep-ph
28
The categories of this paper are: alg-geom
8
The categories of this paper are: hep-ex
20
The categories of this paper are: acc-phys
27
The categories of this paper are: comp-gas
1
The categories of this paper are: cs
31
The categories of this paper are: ao-sci
32
The categories of this paper are: atom-ph
11
The categories of this paper are: hep-lat
10
The categories of this paper are: q-bio
24
The categories of this paper are: dg-ga
25
The categories of this paper are: patt-sol
34
The categories of this paper are: chem-ph
33
The categories of this paper are: plasm-ph