Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Orientation Dynamics of Sedimenting Anisotropic Particles in Turbulence   We examine the dynamics of small anisotropic particles (spheroids)
sedimenting through homogeneous isotropic turbulence using direct numerical
simulations and theory. The gravity-induced inertial torque acting on
sub-Kolmogorov spheroids leads to pronouncedly non-Gaussian orientation
distributions localized about the broadside-on(to gravity) orientation.
Orientation distributions and average settling velocities are obtained over a
wide range of spheroid aspect ratios, Stokes and Froude numbers. Orientational
moments from the simulations compare well with analytical predictions in the
inertialess rapid-settling limit, with both exhibiting a non-monotonic
dependence on spheroid aspect ratio. Deviations arise at Stokes numbers of
order unity due to a spatially inhomogeneous particle concentration field
resulting from a preferential sweeping effect; as a consequence, the
time-averaged particle settling velocities exceed the orientationally averaged
estimates.

28
The categories of this paper are: alg-geom
18
The categories of this paper are: econ
15
The categories of this paper are: nucl-ex
30
The categories of this paper are: q-alg
22
The categories of this paper are: chao-dyn
0
The categories of this paper are: hep-ph
4
The categories of this paper are: cond-mat
36
The categories of this paper are: cmp-lg
24
The categories of this paper are: dg-ga
7
The categories of this paper are: hep-th
6
The categories of this paper are: astro-ph
17
The categories of this paper are: q-fin
31
The categories of this paper are: ao-sci
19
The categories of this paper are: eess
21
The categories of this paper are: adap-org
12
The categories of this paper are: nucl-th