Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Intermittent and continuos flows in granular piles: effects of
  controlling the feeding height   Using a specially designed experimental set up, we have studied the so-called
continuous to intermittent flow transition in sand piles confined in a
Hele-Shaw cell where the deposition height of the sand can be controlled.
Through systematic measurements varying the height and the input flow, we have
established, for the first time, how the size of the pile at which the
transition takes place depends on the two parameters studied. The results
obtained allows to explain, at least semi-quantitatively, the observations
commonly reported in the literature, carried out in experiments where the
deposition height is not controlled.

19
The categories of this paper are: eess
12
The categories of this paper are: nucl-th
0
The categories of this paper are: hep-ph
8
The categories of this paper are: hep-ex
31
The categories of this paper are: ao-sci
5
The categories of this paper are: gr-qc
20
The categories of this paper are: acc-phys
14
The categories of this paper are: math-ph
3
The categories of this paper are: physics
7
The categories of this paper are: hep-th
17
The categories of this paper are: q-fin
28
The categories of this paper are: alg-geom
9
The categories of this paper are: nlin
25
The categories of this paper are: patt-sol
26
The categories of this paper are: bayes-an
10
The categories of this paper are: q-bio