Publication result detail

Characteristics of droplets formed on the outer surface of the rotating packed bed

HÁJEK, O.; BOUCHAL, P.; CEJPEK, O.; MALÝ, M.; HÁJEK, J.; PRINZ, F.; ZAWADSKI, D.; BLATKIEWICZ, M.; JÍCHA, M.

Original Title

Characteristics of droplets formed on the outer surface of the rotating packed bed

English Title

Characteristics of droplets formed on the outer surface of the rotating packed bed

Type

Paper in proceedings (conference paper)

Original Abstract

A rotating packed bed (RPB), as a device for mass transfer enhancement, can be divided into three main parts. An eye of a rotor, a packing, and an outer cavity. It has been reported that a contribution to the total mass transfer of the outer cavity can reach up to 30% of the whole device. Mass transfer is highly influenced by the droplet hydrodynamics and dimensions, hence the liquid dispersion from the outer surface of a metal foam packing was recorded with a high-speed camera. The recordings were analysed with an in-house MATLAB® code to determine the droplet dimensions, and with a PIVlab software to evaluate velocity fields. It has been found that the droplet dimensions and velocities were influenced primarily by a packing speed, as the higher packing speed resulted in a presence of the smaller droplets. Two peaks in histograms for the droplet diameters could be explained with a breakup theory of a liquid jet which breaks into large, mother, and small, satellite droplets. The droplet velocity corresponded to a peripheral velocity of the packing. A liquid flow rate influenced only the number of droplets dispersed from the packing.

English abstract

A rotating packed bed (RPB), as a device for mass transfer enhancement, can be divided into three main parts. An eye of a rotor, a packing, and an outer cavity. It has been reported that a contribution to the total mass transfer of the outer cavity can reach up to 30% of the whole device. Mass transfer is highly influenced by the droplet hydrodynamics and dimensions, hence the liquid dispersion from the outer surface of a metal foam packing was recorded with a high-speed camera. The recordings were analysed with an in-house MATLAB® code to determine the droplet dimensions, and with a PIVlab software to evaluate velocity fields. It has been found that the droplet dimensions and velocities were influenced primarily by a packing speed, as the higher packing speed resulted in a presence of the smaller droplets. Two peaks in histograms for the droplet diameters could be explained with a breakup theory of a liquid jet which breaks into large, mother, and small, satellite droplets. The droplet velocity corresponded to a peripheral velocity of the packing. A liquid flow rate influenced only the number of droplets dispersed from the packing.

Keywords

rotating packed bed, dispersion, droplet

Key words in English

rotating packed bed, dispersion, droplet

Authors

HÁJEK, O.; BOUCHAL, P.; CEJPEK, O.; MALÝ, M.; HÁJEK, J.; PRINZ, F.; ZAWADSKI, D.; BLATKIEWICZ, M.; JÍCHA, M.

RIV year

2023

Released

29.11.2022

Publisher

EDP Sciences

Book

EPJ Web of Conferences

ISBN

2101-6275

Periodical

EPJ Web of Conferences

Volume

299

State

French Republic

Pages from

1

Pages to

5

Pages count

5

URL

https://www.epj-conferences.org/articles/epjconf/abs/2024/09/epjconf_efm2024_01013/epjconf_efm2024_01013.html

BibTex

@inproceedings{BUT180420,
  author="Ondřej {Hájek} and Patrik {Rapta} and Ondřej {Cejpek} and Milan {Malý} and Jiří {Hájek} and František {Prinz} and Dawid {Zawadski} and Michal {Blatkiewicz} and Miroslav {Jícha}",
  title="Characteristics of droplets formed on the outer surface of the rotating packed bed",
  booktitle="EPJ Web of Conferences",
  year="2022",
  journal="EPJ Web of Conferences",
  volume="299",
  pages="1--5",
  publisher="EDP Sciences",
  doi="10.1051/epjconf/202429901013",
  issn="2100-014X",
  url="https://www.epj-conferences.org/articles/epjconf/abs/2024/09/epjconf_efm2024_01013/epjconf_efm2024_01013.html"
}