Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Adsorption phenomena in the transport of a colloidal particle through a
  nanochannel containing a partially wetting fluid   Using molecular dynamics simulations, we study the motion of a closely
fitting nanometer-size solid sphere in a fluid-filled cylindrical nanochannel
at low Reynolds numbers and for a wide range of fluid-solid interactions
corresponding to different wetting situations. For fluids that are not
completely wetting we observe an interesting and novel adsorption phenomenon,
in which the solid sphere, that was initially moving along the center of the
tube, meanders across the channel and suddenly adsorbes onto the wall.
Thereafter, the adsorbed sphere either {\it sticks} to the wall and remains
motionless on average, or separates slightly from the tube wall and then moves
parallel to the tube axis, while rotating on average. On the other hand, at
short times, i.e. when the solid particle moves with its center close to the
middle of the tube, we find surprisingly good agreement between our results and
the predictions of the continuum approach in spite of the large thermal
fluctuations present in our simulations.

2
The categories of this paper are: math
0
The categories of this paper are: hep-ph
14
The categories of this paper are: math-ph
32
The categories of this paper are: atom-ph
29
The categories of this paper are: funct-an
20
The categories of this paper are: acc-phys
11
The categories of this paper are: hep-lat
9
The categories of this paper are: nlin
13
The categories of this paper are: quant-ph
26
The categories of this paper are: bayes-an
27
The categories of this paper are: comp-gas
30
The categories of this paper are: q-alg
22
The categories of this paper are: chao-dyn
16
The categories of this paper are: stat
36
The categories of this paper are: cmp-lg
15
The categories of this paper are: nucl-ex