Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Preferential Condensation of water droplets using hybrid
  hydrophobic-hydrophilic surfaces   We present a hybrid microtextured surface with heterogeneous
hydrophilic-hydrophobic regions for condensing water vapor while maintaining
anti-wetting behavior. Fluid dynamics videos are shown demonstrating the
difference between condensation on a homogeneous hydrophobic structure and the
same structure with hybrid wetting regions.

17
The categories of this paper are: q-fin
13
The categories of this paper are: quant-ph
32
The categories of this paper are: atom-ph
2
The categories of this paper are: math
20
The categories of this paper are: acc-phys
30
The categories of this paper are: q-alg
22
The categories of this paper are: chao-dyn
36
The categories of this paper are: cmp-lg
1
The categories of this paper are: cs
18
The categories of this paper are: econ
19
The categories of this paper are: eess
27
The categories of this paper are: comp-gas
33
The categories of this paper are: plasm-ph
15
The categories of this paper are: nucl-ex
26
The categories of this paper are: bayes-an
9
The categories of this paper are: nlin