Version 1
: Received: 6 January 2023 / Approved: 10 January 2023 / Online: 10 January 2023 (11:47:47 CET)
Version 2
: Received: 3 February 2023 / Approved: 6 February 2023 / Online: 6 February 2023 (10:04:47 CET)
Espinosa-Moreno, A.S.; Duque-Daza, C.A.; Garzón-Alvarado, D.A. Influence of Morphological Parameters on the Flow Development within Human Airways. Fluids2023, 8, 78.
Espinosa-Moreno, A.S.; Duque-Daza, C.A.; Garzón-Alvarado, D.A. Influence of Morphological Parameters on the Flow Development within Human Airways. Fluids 2023, 8, 78.
Espinosa-Moreno, A.S.; Duque-Daza, C.A.; Garzón-Alvarado, D.A. Influence of Morphological Parameters on the Flow Development within Human Airways. Fluids2023, 8, 78.
Espinosa-Moreno, A.S.; Duque-Daza, C.A.; Garzón-Alvarado, D.A. Influence of Morphological Parameters on the Flow Development within Human Airways. Fluids 2023, 8, 78.
Abstract
Anatomical airways parameters as length, diameter and angles have a strong effect on the flow dynamics. Aiming to explore the effect of variations of the bifurcation angle (BA) and carina rounding radius (CRR) of lower human airways on the respiratory processes, numerical simulations of airflow during inhalation and exhalation were performed using a synthetic bifurcation models. Geometries for the airways models were parameterized based on a set of different BA’s and several CRR’s. A range of Reynolds numbers (Re) relevant to the human breathing process were selected to analyzed the airflow behaviour. The numerical results show a significant influence of BA and the CRR on the development of the airflow within the airways, and therefore affecting some relevant features of the flow, namely the deformation of velocity profiles, alterations of pressure drop, the secondary flow patterns, and finally enhance or attenuation of wall shear stresses (WSS) appearing during the regular respiratory process. A particular relationship between velocity profiles, vorticity and the secondary flow patterns is also discussed.
Keywords
Synthetic human airways; bifurcation angle; carina rounding radius
Subject
Physical Sciences, Fluids and Plasmas Physics
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
