Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Influence of boundary conditions on 2-fluid Systems under horizontal
  vibration   This paper is concerned with 2-phase systems under vibration in gravity
condition, when the gravity is perpendicular to the direction of vibration. It
tries and demonstrates that, even in such a restricted case, the patterns which
can be formed are very sensitive to the cell shape, to the boundary conditions
and to the direction and the mode of vibration, i.e. linear, rotational,...
Pacs # : 5.40 ; 45.70 ; 62.20 ; 83.70.Fn

1
The categories of this paper are: cs
34
The categories of this paper are: chem-ph
19
The categories of this paper are: eess
8
The categories of this paper are: hep-ex
0
The categories of this paper are: hep-ph
22
The categories of this paper are: chao-dyn
30
The categories of this paper are: q-alg
35
The categories of this paper are: mtrl-th
31
The categories of this paper are: ao-sci
37
The categories of this paper are: supr-con
9
The categories of this paper are: nlin
29
The categories of this paper are: funct-an
13
The categories of this paper are: quant-ph
21
The categories of this paper are: adap-org
16
The categories of this paper are: stat
6
The categories of this paper are: astro-ph