Eventos Anais de eventos
ENCIT 2020
18th Brazilian Congress of Thermal Sciences and Engineering
The effect of atherosclerosis on coronary blood flow and wall deformation: a case study using computational fluid dynamics
Submission Author:
Matheus Vinicius de Oliveira Herrero , PR
Co-Authors:
Matheus Vinicius de Oliveira Herrero, ALEXANDRE COSTA, Wilso Wesley Wutzow
Presenter: Matheus Vinicius de Oliveira Herrero
doi://10.26678/ABCM.ENCIT2020.CIT20-0558
Abstract
The purpose of this paper is to develop and build a numerical model to compare two idealized left main coronary arteries (LCA), one healthy and another affected by atherosclerosis, and analyze the impact of an atherosclerotic fatty plaque in the behavior of the blood and the vascular wall. Both LCA geometries were generated based in other existing models. The blood was considered a non-Newtonian fluid and the arterial walls were modelled as Neo-Hookean solids. Literature based boundary conditions were applied and a 2-way fluid-structure interaction (FSI) coupling was set up for the two simulations. Numerical results for the velocity, pressure and wall shear stress were obtained for the fluid volume. The equivalent stresses and deformations on the wall were evaluated. The stenosis increased the peak values for all the quantities of interest analyzed. Increasing concentrations of stresses can be related to higher risks of plaque rupture. Although simplified boundary conditions were used, the results found are in accordance with other works in this field of study.
Keywords
Numerical Methods, Atherosclerosis, hemodynamics, Non-Linear Elasticity, fluid-structure interaction (FSI)
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