Fluid Movement in a Channel With Permeable Walls Covered by Porous Media: A Model of Lung Alveolar Sheet

[+] Author and Article Information
H. T. Tang, Y. C. Fung

Department of Applied Mechanics and Engineering Sciences, University of California, San Diego, La Jolla, Calif.

J. Appl. Mech 42(1), 45-50 (Mar 01, 1975) (6 pages) doi:10.1115/1.3423551 History: Received June 01, 1974; Online July 12, 2010


The smallest microscopic blood vessels in the human lung are organized into sheet-like networks. These sheets form the walls of the 300 million alveoli in which air flows due to breathing. Each sheet may be idealized into a channel bounded by two thin layers of porous media. This paper is concerned with the blood flow in the channel and water movement in the porous wall. The Reynolds number in the lung alveolar sheets is very low, so creeping flow is assumed. Analytical and numerical results on the velocity and pressure distribution in the porous layers are presented.

Copyright © 1975 by ASME
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