Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Deposition of a particle-laden film on the inner wall of a tube   The withdrawal of a liquid or the translation of a liquid slug in a capillary
tube leads to the deposition of a thin film on the inner wall. When particles
or contaminants are present in the liquid, they deposit and contaminate the
tube if the liquid film is sufficiently thick. In this article, we
experimentally investigate the condition under which particles are deposited
during the air invasion in a capillary tube initially filled with a dilute
suspension. We show that the entrainment of particles in the film is controlled
by the ratio of the particle and the tube radii and the capillary number
associated with the front velocity. We also develop a model which suggests
optimal operating conditions to avoid contamination during withdrawal of a
suspension. This deposition mechanism can also be leveraged in coating
processes by controlling the deposition of particles on the inner walls of
channels.

12
The categories of this paper are: nucl-th
1
The categories of this paper are: cs
31
The categories of this paper are: ao-sci
35
The categories of this paper are: mtrl-th
34
The categories of this paper are: chem-ph
23
The categories of this paper are: solv-int
37
The categories of this paper are: supr-con
29
The categories of this paper are: funct-an
0
The categories of this paper are: hep-ph
15
The categories of this paper are: nucl-ex
20
The categories of this paper are: acc-phys
19
The categories of this paper are: eess
8
The categories of this paper are: hep-ex
18
The categories of this paper are: econ
30
The categories of this paper are: q-alg
5
The categories of this paper are: gr-qc