Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Annular shear of cohesionless granular materials: from inertial to
  quasistatic regime   Using discrete simulations, we investigate the behavior of a model granular
material within an annular shear cell. Specifically, two-dimensional assemblies
of disks are placed between two circular walls, the inner one rotating with
prescribed angular velocity, while the outer one may expand or shrink and
maintains a constant radial pressure. Focusing on steady state flows, we
delineate in parameter space the range of applicability of the recently
introduced constitutive laws for sheared granular materials (based on the
inertial number). We discuss the two origins of the stronger strain rates
observed near the inner boundary, the vicinity of the wall and the
heteregeneous stress field in a Couette cell. Above a certain velocity, an
inertial region develops near the inner wall, to which the known constitutive
laws apply, with suitable corrections due to wall slip, for small enough stress
gradients. Away from the inner wall, slow, apparently unbounded creep takes
place in the nominally solid material, although its density and shear to normal
stress ratio are on the jammed side of the critical values. In addition to
rheological characterizations, our simulations provide microscopic information
on the contact network and velocity fluctuations that is potentially useful to
assess theoretical approaches.

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The categories of this paper are: solv-int
12
The categories of this paper are: nucl-th
8
The categories of this paper are: hep-ex
14
The categories of this paper are: math-ph
26
The categories of this paper are: bayes-an
37
The categories of this paper are: supr-con
24
The categories of this paper are: dg-ga
30
The categories of this paper are: q-alg
21
The categories of this paper are: adap-org
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The categories of this paper are: eess
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The categories of this paper are: q-fin
20
The categories of this paper are: acc-phys
18
The categories of this paper are: econ
11
The categories of this paper are: hep-lat
27
The categories of this paper are: comp-gas
2
The categories of this paper are: math