Investigation of spiral blood flow in a model of arterial stenosis

Abstract 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 ste...

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Bibliographic Details
Published in:	Medical engineering & physics Vol. 31; no. 9; pp. 1195 - 1203
Main Authors:	Paul, Manosh C, Larman, Arkaitz
Format:	Journal Article
Language:	English
Published:	England Elsevier Ltd 01-11-2009
Subjects:	Arterial stenosis Arteries - pathology Arteries - physiopathology Blood flow modelling Blood Flow Velocity - physiology Computer Simulation Constriction, Pathologic - pathology Constriction, Pathologic - physiopathology Finite Element Analysis Hemodynamics Hemorheology Humans Kinetics Models, Anatomic Models, Cardiovascular Pressure Pulsatile Flow Radiology Spiral blood flow Stress, Mechanical Swirl flow Swirl flow Arterial stenosis Blood flow modelling Spiral blood flow
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Summary:	Abstract 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 k – 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.
Bibliography:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 ObjectType-Article-2 ObjectType-Feature-1
ISSN:	1350-4533 1873-4030
DOI:	10.1016/j.medengphy.2009.07.008