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Open AccessArticle

Fluid-Structure Interaction in Abdominal Aortic Aneurysms: Effect of Haematocrit

1
Department of Chemical Engineering, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
2
Scientific Computing Department, Rutherford Appleton Laboratory, Didcot OX11 0QX, UK
*
Author to whom correspondence should be addressed.
Fluids 2019, 4(1), 11; https://doi.org/10.3390/fluids4010011
Received: 14 December 2018 / Accepted: 9 January 2019 / Published: 14 January 2019
(This article belongs to the Special Issue Experimental and Numerical Studies in Biomedical Engineering)
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Abstract

The Abdominal Aortic Aneurysm (AAA) is a local dilation of the abdominal aorta and it is a cause for serious concern because of the high mortality associated with its rupture. Consequently, the understanding of the phenomena related to the creation and the progression of an AAA is of crucial importance. In this work, the complicated interaction between the blood flow and the AAA wall is numerically examined using a fully coupled Fluid-Structure Interaction (FSI) method. The study investigates the possible link between the dynamic behavior of an AAA and the blood viscosity variations attributed to the haematocrit value, while it also incorporates the pulsatile blood flow, the non-Newtonian behavior of blood and the hyperelasticity of the arterial wall. It was found that blood viscosity has no significant effect on von Mises stress magnitude and distribution, whereas there is a close relation between the haematocrit value and the Wall Shear Stress (WSS) magnitude in AAAs. This WSS variation can possibly alter the mechanical properties of the arterial wall and increase its growth rate or even its rupture possibility. The relationship between haematocrit and dynamic behavior of an AAA can be helpful in designing a patient specific treatment. View Full-Text
Keywords: Abdominal Aortic Aneurysm; Fluid-Structure Interaction (FSI); Computational Fluid Dynamics (CFD); haematocrit; pulsatile flow; non-Newtonian Abdominal Aortic Aneurysm; Fluid-Structure Interaction (FSI); Computational Fluid Dynamics (CFD); haematocrit; pulsatile flow; non-Newtonian
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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 (CC BY 4.0).
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MDPI and ACS Style

Stergiou, Y.G.; Kanaris, A.G.; Mouza, A.A.; Paras, S.V. Fluid-Structure Interaction in Abdominal Aortic Aneurysms: Effect of Haematocrit. Fluids 2019, 4, 11.

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