Abstract
AbstractThe expiratory flow in a rigid three‐generation airway with one collapsible segment was numerically studied using fluid–structure interaction technique. A self‐developed finite element method code was used to calculate the nonlinear deformation of the thin‐walled structure, whereas a commercial computational fluid dynamics solver was used to resolve the fluid flow. The elastic tube in the second‐generation branch collapsed into wave number N=3 mode. The deformation of the collapsible tube increased the resistance to the fluid flow and formed a jet that altered the downstream flow pattern significantly. Copyright © 2008 John Wiley & Sons, Ltd.
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