Convection/Diffusion Interactions in Oxygen Transport: Effect of Flow Reversal in Lung Airways
Transport of oxygen to alveoli through the airway tree and to tissues through the vascular arborization both involve convection in large vessels followed by diffusion to the final 02 sink. At the transition between convection and diffusion, there is a steep drop of 02 concentration in the flowing medium. Gas in airways differs from the blood in that flow is bidirectional. We use a relatively simple computer model to demonstrate behavior of the steep drop when flow changes direction at end-inspiration.
KeywordsFunctional Residual Capacity Inspiratory Flow Airway Tree Steep Drop Lung Airway
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