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@ARTICLE{Schrder:867526,
author = {Schröder, Franka and Lintermann, Andreas and Klaas,
Michael and Schröder, Wolfgang},
title = {{E}xperimental and {N}umerical {I}nvestigation of the
{T}hreedimensional {F}low at {E}xpiration in the {U}pper
{H}uman {A}irways},
journal = {Journal of fluids engineering},
volume = {6},
number = {1},
issn = {0021-9223},
address = {New York, NY},
publisher = {ASME},
reportid = {FZJ-2019-06149},
pages = {9-28},
year = {2014},
abstract = {This study presents a comparison of numerical and
experimental results of the steady flow field in the left
main-bronchus of the upper human airways during exhalation.
Stereo-particle-image velocimetry measurements were
performed in multiple parallel measurement planes for a
Reynolds number of $Re_D$ = 700 based on the hydraulic
diameter of the trachea to determine the highly
three-dimensional flow in a realistic transparent silicone
lung model. The numerical analysis is based on a
Lattice-Boltzmann method. The results for the absolute
velocity and the out-of-plane velocity component show a good
agreement and emphasize the three-dimensionality of the
flow. Two fluid jets, originating from two principal
sub-bronchi, predominate the flow in the investigated
bronchus. The vortical structures consisting of two pairs of
counterrotating vortices are not generated by the curvature
of the main-bronchus or the sub-bronchi but are caused by
the merging of the flows and the redirection of the jets.
Further downstream in the bronchus, the secondary flow
structures vanish in the streamwise direction such that no
spiral-like flow enters the trachea.},
ddc = {620},
pnm = {511 - Computational Science and Mathematical Methods
(POF3-511)},
pid = {G:(DE-HGF)POF3-511},
typ = {PUB:(DE-HGF)16},
url = {https://juser.fz-juelich.de/record/867526},
}