Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A note on the effective slip properties for microchannel flows with
  ultra-hydrophobic surfaces   A type of super-hydrophobic surface consists of a solid plane boundary with
an array of grooves which, due to the effect of surface tension, prevent a
complete wetting of the wall. The effect is greatest when the grooves are
aligned with the flow. The pressure difference between the liquid and the gas
in the grooves causes a curvature of the liquid surface resisted by surface
tension. The effects of this surface deformation are studied in this paper. The
corrections to the effective slip length produced by the curvature are analyzed
theoretically and a comparison with available data and related mathematical
models is presented.

34
The categories of this paper are: chem-ph
16
The categories of this paper are: stat
32
The categories of this paper are: atom-ph
35
The categories of this paper are: mtrl-th
10
The categories of this paper are: q-bio
21
The categories of this paper are: adap-org
25
The categories of this paper are: patt-sol
36
The categories of this paper are: cmp-lg
30
The categories of this paper are: q-alg
22
The categories of this paper are: chao-dyn
27
The categories of this paper are: comp-gas
26
The categories of this paper are: bayes-an
12
The categories of this paper are: nucl-th
0
The categories of this paper are: hep-ph
6
The categories of this paper are: astro-ph
1
The categories of this paper are: cs