RT Journal Article
T1 Glottis effects on the cough clearance process simulated with a CFD dynamic mesh and Eulerian wall film model
A1 Paz Penín, Maria Concepcion
A1 Suárez Porto, Eduardo
A1 Parga Rodríguez, Óscar
A1 Vence Fernández, Jesús
K1 2205.04 Mecánica de Fluidos
K1 2204 Física de Fluidos
K1 2411 Fisiología Humana
AB In this study, we have reproduced the cough clearance process with an Eulerian wall film model. The simulated domain is based on realistic geometry from the literature, which has been improved by adding the glottis and epiglottis. The vocal fold movement has been included due to the dynamic mesh method, considering different abduction and adduction angles and velocities. The proposed methodology captures the deformation of the flexible tissue, considers non-Newtonian properties for the mucus, and enables us to reproduce a single cough or a cough epoch. The cough efficiency (CE) has been used to quantify the overall performance of the cough, considering many different boundary conditions, for the analysis of the glottis effect. It was observed that a viscous shear force is the main mechanism in the cough clearance process, while the glottis closure time and the epiglottis position do not have a significant effect on the CE. The cough assistance devices improve the CE, and the enhancement rate grows logarithmically with the operating pressure. The cough can achieve an effective mucus clearance process, even with a fixed glottis. Nevertheless, the glottis closure substantially improves the CE results.
PB Computer Methods in Biomechanics & Biomedical Engineering
SN 10255842
YR 2017
FD 2017-08-07
LK http://hdl.handle.net/11093/7001
UL http://hdl.handle.net/11093/7001
LA eng
NO Computer Methods in Biomechanics & Biomedical Engineering, 20(12): 1326-1338 (2017)
DS Investigo
RD 03-dic-2024