A Finite-Element Simulation of Pulsatile Flow in Flexible Obstructed Tubes

[+] Author and Article Information
E. Rooz

Department of Mechanical Engineering, University of Houston, Houston, Tex. 77004

D. F. Young, T. R. Rogge

Department of Engineering Science and Mechanics and the Biomedical Engineering Program, Iowa State University, Ames, Iowa 50011

J Biomech Eng 104(2), 119-124 (May 01, 1982) (6 pages) doi:10.1115/1.3138324 History: Received July 24, 1980; Revised December 07, 1981; Online June 15, 2009


A finite-element model for pulsatile flow in a straight flexible partially obstructed tube is developed. In the unobstructed sections of the tube the model considers the continuity equation, the one-dimensional momentum equation, and an equation of state relating tube cross-sectional area to pressure. For the obstructed region, a nonlinear relationship between the flow and the pressure drop across the stenosis is considered. The applicability of a model is checked by comparing predicted flow and pressure waveforms with corresponding in-vitro experimental measurements obtained on a mechanical system. These comparisons indicate that the model satisfactorily predicts pressures and flows under variety of frequencies of oscillation and stenosis severities.

Copyright © 1982 by ASME
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