A thin annular film lining the inside of a rigid tube is modeled as a liquid-lined airway in this study. Due to the capillary instability, the liquid film can form a plug and obstruct the airway once the ratio of the film thickness to tube radius, ε, is greater than a critical value ∼0.12. The dynamics of the closure process is simulated for a Newtonian viscous film with constant surface tension and a passive core gas phase. The numerical simulation employs the finite volume approach with a sharp interface method for the free surface. The computational results show that the wall shear stress and normal stress during closure can be strong enough to injure airway epithelial cells.
- Bioengineering Division
Fluid Stress Analysis During Airway Closure
- Views Icon Views
- Share Icon Share
- Search Site
Tai, C, Halpern, D, & Grotberg, JB. "Fluid Stress Analysis During Airway Closure." Proceedings of the ASME 2009 Summer Bioengineering Conference. ASME 2009 Summer Bioengineering Conference, Parts A and B. Lake Tahoe, California, USA. June 17–21, 2009. pp. 467-468. ASME. https://doi.org/10.1115/SBC2009-206840
Download citation file: