Publication result detail

Measurement of Cyclic Flows in Trachea Using PIV and Numerical simulation

BĚLKA, M.; ELCNER, J.; JEDELSKÝ, J.; BOIRON, O.; KNAPP, Y.; BAILLY, L.

Original Title

Measurement of Cyclic Flows in Trachea Using PIV and Numerical simulation

English Title

Measurement of Cyclic Flows in Trachea Using PIV and Numerical simulation

Type

Paper in proceedings (conference paper)

Original Abstract

Inhalation of pharmaceutical aerosols is a convenient way to treat lung or even systemic diseases. For effective treatment it is very important to understand air flow characteristics within respiratory airways and determine deposition hot spots. In this paper the air flow in trachea was investigated by numerical simulations. To validate these results we carried out particle image velocimetry experiments and compared resulting velocity fields. Simplified geometry of respiratory airways from oral cavity to 4th generation of branching was employed. Air flow characteristics were analysed during sinusoidal breathing pattern for light activity conditions (period 4 s and tidal volume 1 l). The observed flow fields indicated that the flow in trachea is turbulent during the sinusoidal flow except phases of flow turnarounds. The flow was skewed to front side of the trachea during inspiration and had twin-peak profile during expiration because of the mixing from daughter branches. The methods were compared and good agreement was found. This validation of CFD simulation can result into its further usage in respiratory airflow studies.

English abstract

Inhalation of pharmaceutical aerosols is a convenient way to treat lung or even systemic diseases. For effective treatment it is very important to understand air flow characteristics within respiratory airways and determine deposition hot spots. In this paper the air flow in trachea was investigated by numerical simulations. To validate these results we carried out particle image velocimetry experiments and compared resulting velocity fields. Simplified geometry of respiratory airways from oral cavity to 4th generation of branching was employed. Air flow characteristics were analysed during sinusoidal breathing pattern for light activity conditions (period 4 s and tidal volume 1 l). The observed flow fields indicated that the flow in trachea is turbulent during the sinusoidal flow except phases of flow turnarounds. The flow was skewed to front side of the trachea during inspiration and had twin-peak profile during expiration because of the mixing from daughter branches. The methods were compared and good agreement was found. This validation of CFD simulation can result into its further usage in respiratory airflow studies.

Keywords

particle image velocimetry, CFD, trachea, laryngeal jet

Key words in English

particle image velocimetry, CFD, trachea, laryngeal jet

Authors

BĚLKA, M.; ELCNER, J.; JEDELSKÝ, J.; BOIRON, O.; KNAPP, Y.; BAILLY, L.

RIV year

2016

Released

06.05.2015

Publisher

EDP Sciences

Location

France

Book

EPJ Web of Conferences

ISBN

2100-014X

Periodical

EPJ Web of Conferences

Volume

92

Number

1

State

French Republic

Pages from

1

Pages to

4

Pages count

4

URL

https://www.epj-conferences.org/articles/epjconf/abs/2015/11/epjconf_efm2014_02006/epjconf_efm2014_02006.html

Full text in the Digital Library

http://hdl.handle.net/11012/194767

BibTex

@inproceedings{BUT110746,
  author="Miloslav {Bělka} and Jakub {Elcner} and Jan {Jedelský} and Olivier {Boiron} and Yannick {Knapp} and Lucie {Bailly}",
  title="Measurement of Cyclic Flows in Trachea Using PIV and Numerical simulation",
  booktitle="EPJ Web of Conferences",
  year="2015",
  journal="EPJ Web of Conferences",
  volume="92",
  number="1",
  pages="1--4",
  publisher="EDP Sciences",
  address="France",
  doi="10.1051/epjconf/20159202006",
  issn="2100-014X",
  url="https://www.epj-conferences.org/articles/epjconf/abs/2015/11/epjconf_efm2014_02006/epjconf_efm2014_02006.html"
}

Documents

epjconf_efm2014_02006