Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Discrete element simulations of stress distributions in silos: crossover
  from two to three dimensions   The transition from two-dimensional (2D) to three-dimensional (3D) granular
packings is studied using large-scale discrete element computer simulations. We
focus on vertical stress profiles and examine how they change with
dimensionality from 2D to 3D. We compare results for packings in 2D, quasi-2D
packings between flat plates, and 3D packings. Analysis of these packings
suggests that the Janssen theory does not fully describe these packings,
especially at the top of the piles, where a hydrostatic-like region of vertical
stress is visible in all cases. We find that the interior of the packing is far
from incipient failure, while in general, the forces at the walls are close to
incipient failure.

33
The categories of this paper are: plasm-ph
37
The categories of this paper are: supr-con
5
The categories of this paper are: gr-qc
7
The categories of this paper are: hep-th
36
The categories of this paper are: cmp-lg
1
The categories of this paper are: cs
13
The categories of this paper are: quant-ph
25
The categories of this paper are: patt-sol
15
The categories of this paper are: nucl-ex
12
The categories of this paper are: nucl-th
10
The categories of this paper are: q-bio
16
The categories of this paper are: stat
14
The categories of this paper are: math-ph
0
The categories of this paper are: hep-ph
29
The categories of this paper are: funct-an
17
The categories of this paper are: q-fin