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Experiments in Fluids
Erschienen in: Experiments in Fluids 6/2015

01.06.2015 | Research Article

Three-dimensional inspiratory flow in the upper and central human airways

verfasst von: A. J. Banko, F. Coletti, D. Schiavazzi, C. J. Elkins, J. K. Eaton

Erschienen in: Experiments in Fluids | Ausgabe 6/2015

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Abstract

The steady inspiratory flow through an anatomically accurate model of the human airways was studied experimentally at a regime relevant to deep inspiration for aerosol drug delivery. Magnetic resonance velocimetry was used to obtain the three-component, mean velocity field. A strong, single-sided streamwise swirl was found in the trachea and persists up to the first bifurcation. There, the swirl and the asymmetric anatomy impact both the streamwise momentum distribution and the secondary flows in the main bronchi, with large differences compared to what is found in idealized branching tubes. In further generations, the streamwise velocity never recovers a symmetric profile and the relative intensity of the secondary flows remains strong. Overall, the results suggest that, in real human airways, both streamwise dispersion (due to streamwise gradients) and lateral dispersion (due to secondary flows) are very effective transport mechanisms. Neglecting the extrathoracic airways and idealizing the bronchial tree may lead to qualitatively different conclusions.
Vorheriger Artikel Autonomous spatially adaptive sampling in experiments based on curvature, statistical error and sample spacing with applications in LDA measurements
Nächster Artikel Boundary-layer transition on a rotor blade measured by temperature-sensitive paint, thermal imaging and image derotation

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Metadaten
Titel
Three-dimensional inspiratory flow in the upper and central human airways
verfasst von
A. J. Banko
F. Coletti
D. Schiavazzi
C. J. Elkins
J. K. Eaton
Publikationsdatum
01.06.2015
Verlag
Springer Berlin Heidelberg
Erschienen in
Experiments in Fluids / Ausgabe 6/2015
Print ISSN: 0723-4864
Elektronische ISSN: 1432-1114
DOI
https://doi.org/10.1007/s00348-015-1966-y

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