Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: From granular avalanches to fluid turbulences through oozing pastes. A
  mesoscopic physically-based particle model   In this paper, we describe how we can precisely produce complex and various
dynamic morphological features such as structured and chaotic features which
occur in sand pilings (piles, avalanches, internal collapses, arches) , in
flowing fluids (laminar flowing, Kelvin-Helmholtz and Von Karmann eddies), and
in cohesive pastes (twist-and-turn oozing and packing) using only a single
unified model, called "mesoscopic model". This model is a physically-based
particle model whose behavior depends on only four simple, but easy to
understand, physically-based parameters : elasticity, viscosity and their local
areas of influence. It is fast to compute and easy to understand by
non-physicist users.

36
The categories of this paper are: cmp-lg
22
The categories of this paper are: chao-dyn
25
The categories of this paper are: patt-sol
24
The categories of this paper are: dg-ga
35
The categories of this paper are: mtrl-th
29
The categories of this paper are: funct-an
16
The categories of this paper are: stat
18
The categories of this paper are: econ
31
The categories of this paper are: ao-sci
9
The categories of this paper are: nlin
21
The categories of this paper are: adap-org
30
The categories of this paper are: q-alg
12
The categories of this paper are: nucl-th
28
The categories of this paper are: alg-geom
26
The categories of this paper are: bayes-an
23
The categories of this paper are: solv-int