Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: 3D reconstruction of dynamic liquid film shape by optical grid
  deflection method   In this paper, we describe the optical grid deflection method used to
reconstruct the 3D profile of liquid films deposited by a receding liquid
meniscus. This technique uses the refractive properties of the film surface and
is suitable for liquid thickness from several microns to millimeter. This
method works well for strong interface slopes and changing in time film shape;
it applies when the substrate and fluid media are transparent. The refraction
is assumed to be locally unidirectional. The method is particularly appropriate
to follow the evolution of parameters such as dynamic contact angle, triple
liquid-gas-solid contact line velocity or dewetting ridge thickness.

37
The categories of this paper are: supr-con
11
The categories of this paper are: hep-lat
7
The categories of this paper are: hep-th
31
The categories of this paper are: ao-sci
9
The categories of this paper are: nlin
21
The categories of this paper are: adap-org
16
The categories of this paper are: stat
1
The categories of this paper are: cs
5
The categories of this paper are: gr-qc
29
The categories of this paper are: funct-an
8
The categories of this paper are: hep-ex
34
The categories of this paper are: chem-ph
22
The categories of this paper are: chao-dyn
23
The categories of this paper are: solv-int
10
The categories of this paper are: q-bio
18
The categories of this paper are: econ