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Fluid-structure interaction of blood flow Through human arteries

Khader, Abdul S M (2014) Fluid-structure interaction of blood flow Through human arteries. Phd. Thesis thesis, Manipal Institute of Technology, Manipal.

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Abstract

Flow of blood in arteries has baffled many researchers and is further complicated by arterial diseases such as atherosclerosis and aneurysms. The compliant wall of the arteries gives rise to the phenomenon of Fluid-Structure Interaction. The present clinical imaging and diagnostic tools are not of much use in investigating the detailed haemodynamics in such cardiovascular disorders. These altered blood flow conditions in atherosclerosis, aneurysms, stent interaction with blood stream seriously affect the haemodynamics in critical zones, obstructing normal blood flow conditions. Moreover, the flow behavior, especially in large arteries is highly complex and significantly influenced by the compliant arterial wall. Apart from this, the humans adopt different postures in daily routine and thus, different organs, body systems and other essential body fluids including blood are influenced by the gravitational pull. This interesting phenomenon of blood pressure variation during different postures is currently investigated by simulating blood flow in normal and diseased large arteries. Coupled field multiphysics based software tools are very useful and are widely used nowadays to carry out studies on arteries and evaluate their complications. In the present study, commercially available FSI solver in ANSYS is used to simulate the blood flow by carrying out two-way sequentially coupled transient analysis between ANSYS CFX and ANSYS structure. CFD validation is done by comparing a 3D idealistic carotid bifurcation for steady state condition with the available literature, which agreed well. Besides, the FSI capability in ANSYS WORKBENCH is also verified through a bench mark problem used by several researchers in the past. The wave propagation and arterial wall deformation phenomenon observed for the short pulse applied at the inlet agrees well with the literature.

Item Type: Thesis (Phd. Thesis)
Subjects: Engineering > MIT Manipal > Mechanical and Manufacturing
Depositing User: MIT Library
Date Deposited: 28 Jun 2016 14:48
Last Modified: 28 Jun 2016 14:48
URI: http://eprints.manipal.edu/id/eprint/146421

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