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RESEARCH PAPERS

Flow Studies in Canine Artery Bifurcations Using a Numerical Simulation Method

[+] Author and Article Information
X. Y. Xu, M. W. Collins

Thermo-Fluids Engineering Research Centre, City University, London EC1V 0HB, U.K.

C. J. H. Jones

Department of Cardiology, University of Wales College of Medicine, Heath Park, Cardiff CF4 4XN, U.K.

J Biomech Eng 114(4), 504-511 (Nov 01, 1992) (8 pages) doi:10.1115/1.2894102 History: Received January 31, 1991; Revised February 28, 1992; Online March 17, 2008

Abstract

Three-dimensional flows through canine femoral bifurcation models were predicted under physiological flow conditions by solving numerically the time-dependent threedimensional Navier-stokes equations. In the calculations, two models were assumed for the blood, those of (a) a Newtonian fluid, and (b) a non-Newtonian fluid obeying the power law. The blood vessel wall was assumed to be rigid this being the only approximation to the prediction model. The numerical procedure utilized a finite volume approach on a finite element mesh to discretize the equations, and the code used (ASTEC) incorporated the SIMPLE velocity-pressure algorithm in performing the calculations. The predicted velocity profiles were in good qualitative agreement with the in vivo measurements recently obtained by Jones et al. [1]. The non-Newtonian effects on the bifurcation flow field were also investigated, and no great differences in velocity profiles were observed. This indicated that the non-Newtonian characteristics of the blood might not be an important factor in determining the general flow patterns for these bifurcations, but could have local significance. Current work involves modeling wall distensibility in an empirically valid manner. Predictions accommodating these will permit a true quantitative comparison with experiment.

Copyright © 1992 by The American Society of Mechanical Engineers
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