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Computational and Mathematical Methods in Medicine
Volume 2015, Article ID 515613, 10 pages
http://dx.doi.org/10.1155/2015/515613
Research Article

Numerical Study of Turbulent Pulsatile Blood Flow through Stenosed Artery Using Fluid-Solid Interaction

1Department of Mechanical Engineering, Isfahan University of Technology, Isfahan 8415683111, Iran
2Department of Biomedical Engineering, University of Isfahan, Isfahan 8174673441, Iran

Received 4 November 2014; Accepted 24 March 2015

Academic Editor: Eduardo Soudah

Copyright © 2015 Mehdi Jahangiri et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The turbulent pulsatile blood flow through stenosed arteries considering the elastic property of the wall is investigated numerically. During the numerical model validation both standard - model and RNG - model are used. Compared with the RNG - model, the standard - model shows better agreement with previous experimental results and is better able to show the reverse flow region. Also, compared with experimental data, the results show that, up to 70% stenosis, the flow is laminar and for 80% stenosis the flow becomes turbulent. Assuming laminar or turbulent flow and also rigid or elastic walls, the results are compared with each other. The investigation of time-averaged shear stress and the oscillatory shear index for 80% stenosis show that assuming laminar flow will cause more error than assuming a rigid wall. The results also show that, in turbulent flow compared with laminar flow, the importance of assuming a flexible artery wall is more than assuming a rigid artery wall.