Detail publikace

Study of cyclic and steady particle motion in a realistic human airway model using phase-Doppler anemometry

JEDELSKÝ, J. LÍZAL, F. JÍCHA, M.

Originální název

Study of cyclic and steady particle motion in a realistic human airway model using phase-Doppler anemometry

Typ

článek ve sborníku ve WoS nebo Scopus

Jazyk

angličtina

Originální abstrakt

Transport and deposition of particles in human airways has been of research interest for many years. Various experimental methods such as constant temperature anemometry, particle image velocimetry and laser-Doppler based techniques were employed for study of aerosol transport in the past. We use Phase-Doppler Particle Analyser (P/DPA) for time resolved size and velocity measurement of liquid aerosol particles in a size range 1 to 8 um. The di-2-ethylhexyl sabacate (DEHS) particles were produced by condensation monodisperse aerosol generator. A thin-wall transparent model of human airways with non-symmetric bifurcations and non-planar geometry containing parts from throat to 3rd-4th generation of bronchi was fabricated for the study. Several cyclic (sinusoidal) breathing regimes were simulated using pneumatic breathing mechanism. Analogous steady-flow regimes were also investigated and used for comparison. An analysis of the particle velocity data was performed with aim to gain deeper understanding of the transport phenomena in the realistic bifurcating airway system. Flows of particles of different sizes in range 1-10 um was found to slightly differ for extremely high Stokes numbers. Differences in steady and cyclic turbulence intensities were documented in the paper. Systematically higher turbulence intensity was found for cyclic flows and mainly in the expiration breathing phase. Negligible differences were found for behaviour of different particle size classes in the inspected range 1 to 8 um. Possibility of velocity spectra estimation of air flow using the P/DPA data is discussed.

Klíčová slova

cyclic and steady flow, particle motion, realistic human airway model, phase-doppler anemometry

Autoři

JEDELSKÝ, J.; LÍZAL, F.; JÍCHA, M.

Rok RIV

2010

Vydáno

24. 11. 2010

Nakladatel

EDP Sciences

Místo

Liberec

ISBN

978-80-7372-670-6

Kniha

International conference Experimental Fluid Mechanics 2010 Conference Proceedings Volume 1

Edice

1

Číslo edice

1

ISSN

2100-014X

Periodikum

EPJ Web of Conferences

Ročník

25

Číslo

1

Stát

Francouzská republika

Strany od

252

Strany do

262

Strany počet

11

URL

http://www.epj-conferences.org/articles/epjconf/abs/2012/07/epjconf_EFM2011_02010/epjconf_EFM2011_02010.html

Plný text v Digitální knihovně

http://hdl.handle.net/11012/194730

BibTex

@inproceedings{BUT34578,
  author="Jan {Jedelský} and František {Lízal} and Miroslav {Jícha}",
  title="Study of cyclic and steady particle motion in a realistic human airway model using phase-Doppler anemometry",
  booktitle="International conference Experimental Fluid Mechanics 2010 Conference Proceedings Volume 1",
  year="2010",
  series="1",
  journal="EPJ Web of Conferences",
  volume="25",
  number="1",
  pages="252--262",
  publisher="EDP Sciences",
  address="Liberec",
  doi="10.1051/epjconf/20122502010",
  isbn="978-80-7372-670-6",
  issn="2100-014X",
  url="http://www.epj-conferences.org/articles/epjconf/abs/2012/07/epjconf_EFM2011_02010/epjconf_EFM2011_02010.html"
}