Steady Flow Through Collapsible Tubes: Measurements of Flow and Geometry

[+] Author and Article Information
D. Elad, M. Sahar, J. M. Avidor, S. Einav

Tel Aviv University, Tel Aviv 69978, Israel

J Biomech Eng 114(1), 84-91 (Feb 01, 1992) (8 pages) doi:10.1115/1.2895454 History: Received August 06, 1991; Revised September 30, 1991; Online March 17, 2008


Compliant tubes attain a complex three-dimensional geometry when the external pressure exceeds the internal pressure and the tube is partially collapsed. A new technique for remote measurement of dynamic surfaces was applied to classical experiments with collapsible tubes. This work presents measurements of the threedimensional structure of the tube as well as pressure and flow measurements during static loading and during steady-state fluid flow. Results are shown for two tubes of the same material and internal diameter but with different wall thicknesses. The measured tube laws compare well with previously published data and suggest the possible existence of a similarity tube law. The steady flow measurements did not compare well with the one-dimensional theoretical predictions.

Copyright © 1992 by The American Society of Mechanical Engineers
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