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
Full text in the Digital Library
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