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Numerical studies of physiological pulsatile flow through constricted tube

Wei Liao (Department of Mechanical Engineering, National University of Singapore, Singapore)
T.S. Lee (Department of Mechanical Engineering, National University of Singapore, Singapore)
H.T. Low (Department of Mechanical Engineering, National University of Singapore, Singapore)

International Journal of Numerical Methods for Heat & Fluid Flow

ISSN: 0961-5539

Article publication date: 1 July 2004

Abstract

A detailed analysis on the characteristics of laminar flow over a bell‐shaped stenosis for a physiological pulsatile flow is presented in this study. In order to have a good understanding of the physiological pulsatile flow, a comparison of the numerical solutions to three types of pulsatile flows, including a physiological flow, an equivalent pulsatile flow and a pure sinusoidal flow, are made in this work. The comparison shows that the flow behavior cannot be properly estimated if the equivalent or simple pulsatile inlet flow is used in the study of flow fields through stenosed arteries instead of actual physiological one. Then the physiological pulsatile flow is further studied by considering the effect of constriction ratio of stenosis, Womersley number and Reynolds number on the flow behavior through stenosed arteries. The analysis shows that the variation of these flow parameters puts significant impacts on the pulsatile flow field for the physiological flow.

Keywords

Citation

Liao, W., Lee, T.S. and Low, H.T. (2004), "Numerical studies of physiological pulsatile flow through constricted tube", International Journal of Numerical Methods for Heat & Fluid Flow, Vol. 14 No. 5, pp. 689-713. https://doi.org/10.1108/09615530410539991

Publisher

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Emerald Group Publishing Limited

Copyright © 2004, Emerald Group Publishing Limited