Time-resolved characteristics of oscillatory particle-laden air flow in a realistic human airway model
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26210%2F24%3APU151400" target="_blank" >RIV/00216305:26210/24:PU151400 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1016/j.euromechflu.2024.01.003" target="_blank" >https://doi.org/10.1016/j.euromechflu.2024.01.003</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.euromechflu.2024.01.003" target="_blank" >10.1016/j.euromechflu.2024.01.003</a>
Alternative languages
Result language
angličtina
Original language name
Time-resolved characteristics of oscillatory particle-laden air flow in a realistic human airway model
Original language description
Human airways represent a complex flow system with a spatially and temporally variable character of air flow during respiration. In this paper, we experimentally studied the oscillatory flow of air with monodispersed micron-sized liquid particles in a transparent, anatomically realistic model of human upper airways and several bronchi generations using phase-Doppler anemometry (PDA). The PDA provided point-wise high-frequency measurements of axial velocities of individual aerosol particles in multiple positions of the airways (in the trachea and the upper bronchi) for three breathing regimes with a sinusoidal course. Typical time-resolved velocity plots at several positions within the model were documented and analysed using dimensionless criteria. Local mean air velocity and turbulence time-lines disclosed specific flow dynamic features in the multiple bifurcation system, namely the transit of vortical structures, oscillations induced by flow reversals, and inspiratory flow separations behind bifurcations. The results elucidated the laminar, transitional and turbulent flows during inspiratory and expiratory breathing phases. The character of the flow varies significantly with position in the airways, while the breathing regime has a generally low effect on the flow character. Inspection of the flow in the terminal branches indicated the need to add further branches for more realistic results there.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
20300 - Mechanical engineering
Result continuities
Project
<a href="/en/project/GA22-20357S" target="_blank" >GA22-20357S: Measurement and computational simulation of transport of fibrous aerosols in high velocity gradient flow and interaction of fibres with a wall</a><br>
Continuities
S - Specificky vyzkum na vysokych skolach
Others
Publication year
2024
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
EUROPEAN JOURNAL OF MECHANICS B-FLUIDS
ISSN
0997-7546
e-ISSN
1873-7390
Volume of the periodical
105
Issue of the periodical within the volume
May-June
Country of publishing house
FR - FRANCE
Number of pages
19
Pages from-to
219-237
UT code for WoS article
001172278800001
EID of the result in the Scopus database
2-s2.0-85183842900