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RESEARCH PAPERS

Steady Flow Through a Double Converging-Diverging Tube Model for Mild Coronary Stenoses

[+] Author and Article Information
S. C. van Dreumel, G. D. C. Kuiken

Laboratory for Aero- and Hydrodynamics, Delft University of Technology, 2628 AL Delft, The Netherlands

J Biomech Eng 111(3), 212-221 (Aug 01, 1989) (10 pages) doi:10.1115/1.3168368 History: Received December 08, 1987; Revised April 18, 1989; Online June 12, 2009

Abstract

Velocity profiles and the pressure drop across two mild (62 percent) coronary stenoses in series have been investigated numerically and experimentally in a perspex-tube model. The mean flow rate was varied to correspond to a Reynolds number range of 50–400. The pressure drop across two identical (62 percent) stenoses show that for low Reynolds numbers the total effect of two stenoses equals that of two single stenoses. A reduction of 10 percent is found for the higher Reynolds numbers investigated. Numerical and experimental results obtained for the velocity profiles agree very well. The effect of varying the converging angle of a single mild (62 percent) coronary stenosis on the fluid flow has been determined numerically using a finite element method. Pressure-flow relation, especially with respect to relative short stenoses, is discussed.

Copyright © 1989 by ASME
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