Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Penetration and Secondary Atomization of Droplets Impacted on Wet
  Facemasks   Face covering, commonly known as facemask, is considered to be one of the
most effective Personal Protective Equipments (PPEs) to reduce transmissions of
pathogens through respiratory droplets - both large drops and liquid aerosol
particles. Face masks, not only inhibit the expulsion of such respiratory
droplets from the user, but also protects the user from inhaling pathogen-laden
potentially harmful droplets or their dried nuclei. While the efficacies of
various dry face masks have been explored in the recent past, a comprehensive
investigation of a wet mask is lacking. Yet, users wear masks for a long period
of time and during this period, owing to respiratory droplets released through
multiple respiratory events, the mask matrix becomes wet. We, herein, present
an experimental study on the dynamics of sequential impacts of droplets on
masks to understand how wetness affects possible penetration and secondary
atomization of the impacted droplet. Two different types of masks, hydrophobic
and hydrophilic, were used in this study to evaluate the underlying physical
mechanism that controls the penetration in each of them.

33
The categories of this paper are: plasm-ph
0
The categories of this paper are: hep-ph
23
The categories of this paper are: solv-int
8
The categories of this paper are: hep-ex
37
The categories of this paper are: supr-con
21
The categories of this paper are: adap-org
19
The categories of this paper are: eess
27
The categories of this paper are: comp-gas
15
The categories of this paper are: nucl-ex
29
The categories of this paper are: funct-an
6
The categories of this paper are: astro-ph
28
The categories of this paper are: alg-geom
31
The categories of this paper are: ao-sci
1
The categories of this paper are: cs
11
The categories of this paper are: hep-lat
2
The categories of this paper are: math