Blood flow in stenosed arteries using two way, fluid-structural interaction

Colin Xu-Chao Chen, Yan Ding, John Anthony Gear


Blood flow in a stenosed artery was simulated using the two way, fluid-structural interactions in ANSYS---a commercial finite element and finite volume software widely used in industry. Several stenosis models were investigated using a pulsatile flow condition. In these models the form of the stenosis geometry was either axisymmetric or axis-asymmetric. The blood was modelled both as a non-Newtonian, power law fluid, and as the Casson model. The artery tissue was assumed to be a linear elastic material for the axis-symmetric stenosis model and nonlinear material for the axis-asymmetric stenosis models. A fibrous cap and lipid pool were also added into the stenosis geometry of the axis-asymmetric models to account for complexities of the physiology. The effect of the stenosis severity on arteries was investigated by examining the blood flow velocity, pressure and wall shear stress at multiple locations.

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Fluid-Structural Interaction (FSI); Non-Newtonian fluid; Stenosis; Artery; Blood flow.

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