Investigation of spiral blood flow in a model of arterial stenosis

Paul, M.C. and Larman, A. (2009) Investigation of spiral blood flow in a model of arterial stenosis. Medical Engineering and Physics, 31(9), pp. 1195-1203. (doi: 10.1016/j.medengphy.2009.07.008)

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The spiral component of blood flow has both beneficial and detrimental effects in human circulatory system [Stonebridge PA, Brophy CM. Spiral laminar flow in arteries? Lancet 1991; 338: 1360–1]. We investigate the effects of the spiral blood flow in a model of three-dimensional arterial stenosis with a 75% cross-sectional area reduction at the centre by means of computational fluid dynamics (CFD) techniques. The standard κ–ω model is employed for simulation of the blood flow for the Reynolds number of 500 and 1000. We find that for Re = 500 the spiral component of the blood flow increases both the total pressure and velocity of the blood, and some significant differences are found between the wall shear stresses of the spiral and non-spiral induced flow downstream of the stenosis. The turbulent kinetic energy is reduced by the spiral flow as it induces the rotational stabilities in the forward flow. For Re = 1000 the tangential component of the blood velocity is most influenced by the spiral speed, but the effect of the spiral flow on the centreline turbulent kinetic energy and shear stress is mild. The results of the effects of the spiral flow are discussed in the paper along with the relevant pathological issues.

Item Type:Articles
Keywords:Spiral blood flow, arterial stenosis, blood flow modelling, swirl flow
Glasgow Author(s) Enlighten ID:Paul, Professor Manosh
Authors: Paul, M.C., and Larman, A.
Subjects:R Medicine > RC Internal medicine
College/School:College of Science and Engineering > School of Engineering > Systems Power and Energy
Journal Name:Medical Engineering and Physics
ISSN (Online):1873-4030
Published Online:11 August 2009
Copyright Holders:Copyright © 2009 Elsevier
First Published:First published in Medical Engineering and Physics 31(9):1195-1203
Publisher Policy:Reproduced in accordance with the copyright policy of the publisher.

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