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A compartmental dispersion model for the analysis of mixing in tube networks

✍ Scribed by James S. Ultman; Hal S. Blatman

Publisher
American Institute of Chemical Engineers
Year
1977
Tongue
English
Weight
823 KB
Volume
23
Category
Article
ISSN
0001-1541

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✦ Synopsis

Abstract

A compartmental dispersion model of longitudinal mixing in tube networks has been developed. The ability of this model to predict the impulse response of helium, benzene vapor, and sulfur hexafluride tracer gases in two and in five generation symmetric network models of the large airway system of the lung has been tested over an air flow range of 1 to 400 ml/s.

The results imply that velocity profile distortion and secondary flows in branching regions have only a small effect upon the overall longitudinal mixing when flow is directed toward the higher‐order generations. On the other hand, accurate prediction of the data requires adequate treatment of the finite rate of evolution of the Taylor dispersion occurring in these tube networks.

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