Accurate prediction of blood flow transients : a fluid-structure interaction approach

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Title: Accurate prediction of blood flow transients : a fluid-structure interaction approach
Authors: Kanyanta, Valentine
Ivankovic, Alojz
Karac, Aleksandar
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Date: 1-Jul-2009
Abstract: Numerical studies are widely employed in establishing blood flow transients in arteries. Unfortunately, many of these are based on rigid arterial geometries where the physiological interaction between the flowing blood and the dynamics of a deforming arterial wall is ignored. Although many recent studies have adopted a fluid-structure interaction (FSI) approach, they lack the necessary validation and, thus, cannot guarantee the accuracy of their predictions. This work employs a well-validated FSI model to establish the dependency of WSS transients on arterial flexibility and predict flow transients in arterial geometries. Results show a high dependency of WSS transients on arterial wall flexibility, with hoop strains of as low as 0.15% showing significant differences in these transients compared to that seen in a rigid geometry. It is also shown that flow in the atherosclerosis susceptible regions of the vascular tree is characterised by a highly disturbed flow. In these regions, WSS magnitudes are at their lowest, while the WSS spatial gradients, rate of change and oscillatory shear index are at their highest.
Type of material: Conference Publication
Publisher: Computational & Mathematical Biomedical Engineering (CMBE)
Copyright (published version): 2009 The Authors
Keywords: Blood flow transientsWall shear stressFluid-structure interaction
Language: en
Status of Item: Not peer reviewed
Conference Details: Computational and Mathematical Biomedical Engineering (CMBE09), Swansea, UK, June 29- July 1, 2009
Appears in Collections:Mechanical & Materials Engineering Research Collection

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