Coupled discrete phase model and Eulerian wall film model for numerical simulation of respiratory droplet generation during coughing.

ABSTRACT: Computational fluid dynamics is widely used to simulate droplet-spreading behavior due to respiratory events. However, droplet generation inside the body, such as the number, mass, and particle size distribution, has not been quantitatively analyzed. The aim of this study was to identify quantitative characteristics of droplet generation during coughing. Airflow simulations were performed by coupling the discrete phase model and Eulerian wall film model to reproduce shear-induced stripping of airway mucosa. An ideal airway model with symmetric bifurcations was constructed, and the wall domain was covered by a mucous liquid film. The results of the transient airflow simulation indicated that the droplets had a wide particle size distribution of 0.1-400 µm, and smaller droplets were generate

SUBMITTER: Anzai H 

PROVIDER: S-EPMC9434508 | biostudies-literature | 2022 Sep

REPOSITORIES: biostudies-literature