Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Chiral transfer of angular momentum   Suppose that viscous fluid is contained in the space between a fixed sphere
$S_2$ and an interior sphere $S_1$ which moves with time-periodic velocity
${\bf U}(t)$ and angular velocity ${\bf \Omega}(t)$, with $ \left<{\bf
U}(t)\right> = \left<{\bf \Omega}(t)\right> = 0$. It is shown that, provided
this motion is chiral in character, it can drive a flow that exerts a non-zero
torque on $S_2$. Thus angular momentum can be transferred through this
mechanism.

16
The categories of this paper are: stat
22
The categories of this paper are: chao-dyn
36
The categories of this paper are: cmp-lg
25
The categories of this paper are: patt-sol
33
The categories of this paper are: plasm-ph
19
The categories of this paper are: eess
35
The categories of this paper are: mtrl-th
18
The categories of this paper are: econ
8
The categories of this paper are: hep-ex
7
The categories of this paper are: hep-th
5
The categories of this paper are: gr-qc
32
The categories of this paper are: atom-ph
4
The categories of this paper are: cond-mat
34
The categories of this paper are: chem-ph
14
The categories of this paper are: math-ph
31
The categories of this paper are: ao-sci