Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/17820
Title: Modeling the bifurcating flow in an asymmetric human lung airway
Authors: Liu, Y 
So, RMC
Zhang, CH
Keywords: Asymmetric bifurcation flow
Human lung
Three-dimensional modeling
Issue Date: 2003
Publisher: Elsevier
Source: Journal of biomechanics, 2003, v. 36, no. 7, p. 951-959 How to cite?
Journal: Journal of biomechanics 
Abstract: In a former paper, the inspiratory flow characteristics in a three-generation symmetric bifurcation airway have been numerically investigated using a control volume method to solve the fully three-dimensional laminar Navier-Stokes equations. The present paper extends the work to deal with asymmetric airway extracted from the 5th-11th branches of the model of Weibel (Morphometry of the Human Lung. New York Academic Press, Verlag, 1963) in order to more appropriately model human air passage. Computations are carried out in the Reynolds number range 200-1600, corresponding to mouth-air breathing rates ranging from 0.27 to 2.16l/s, representative for an averaged height man breathing from quiet to vigorous state. Particular attentions are paid to establishing relations between the Reynolds number and the overall flow characteristics, including flow patterns and pressure drop. The study shows that the ratios of airflow rate through the medial branches to that of their mother branches are the same, and this is also true for the ratios of airflow rate through the lateral branches. This partially explains why regular human breathing is not affected by airways of different sizes.
URI: http://hdl.handle.net/10397/17820
ISSN: 0021-9290
DOI: 10.1016/S0021-9290(03)00064-2
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