Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Inertial torque on a small spheroid in a stationary uniform flow   How anisotropic particles rotate and orient in a flow depends on the
hydrodynamic torque they experience. Here we compute the torque acting on a
small spheroid in a uniform flow by numerically solving the Navier-Stokes
equations. Particle shape is varied from oblate (aspect ratio $\lambda = 1/6$)
to prolate ($\lambda = 6$), and we consider low and moderate particle Reynolds
numbers (${\rm Re} \le 50$). We demonstrate that the angular dependence of the
torque, predicted theoretically for small particle Reynolds numbers remains
qualitatively correct for Reynolds numbers up to ${\rm Re} \sim 10$. The
amplitude of the torque, however, is smaller than the theoretical prediction,
the more so as ${\rm Re}$ increases. For Re larger than $10$, the flow past
oblate spheroids acquires a more complicated structure, resulting in systematic
deviations from the theoretical predictions. Overall, our numerical results
provide a justification of recent theories for the orientation statistics of
ice-crystals settling in a turbulent flow.

33
The categories of this paper are: plasm-ph
0
The categories of this paper are: hep-ph
11
The categories of this paper are: hep-lat
20
The categories of this paper are: acc-phys
7
The categories of this paper are: hep-th
2
The categories of this paper are: math
26
The categories of this paper are: bayes-an
1
The categories of this paper are: cs
24
The categories of this paper are: dg-ga
35
The categories of this paper are: mtrl-th
4
The categories of this paper are: cond-mat
27
The categories of this paper are: comp-gas
21
The categories of this paper are: adap-org
13
The categories of this paper are: quant-ph
22
The categories of this paper are: chao-dyn
32
The categories of this paper are: atom-ph