Eventos Anais de eventos
ENCIT 2018
Brazilian Congress of Thermal Sciences and Engineering
Effect of blood rheology model on hemodynamic parameters related to intracranial aneurysm rupture
Submission Author:
Iago Lessa Oliveira , SP , Canada
Co-Authors:
Iago Lessa Oliveira, Gabriel Bertacco dos Santos, José Luiz Gasche, Julio Militzer, Carlos Baccin
Presenter: Iago Lessa Oliveira
doi://10.26678/ABCM.ENCIT2018.CIT18-0761
Abstract
Aneurysms are abnormalities formed in some regions of the human vascular system and are characterized by dilated and thin regions of the arterial wall. One of the most common types occurs inside the brain arteries in the circle of Willis. These intracranial aneurysms are extremely dangerous because in case of rupture they can cause subarachnoid hemorrhage, with consequent death or presence of permanent damage to the patient. Causes of aneurysms have been investigated for a long time, and researchers agree that hemodynamic effects play a key role in the rupture of brain aneurysms. With the development of scanning techniques of the cerebral vascular system, it has been possible to obtain the geometry of aneurysms allowing numerical methods for the solution of blood flow to be used. Since then, several researchers have been investigating the influence of biological and hemodynamic variables on aneurysms rupture considering arteries and aneurysms as rigid walls. However, few studies analyze the influence of the blood rheology model on these parameters. In this work we simulated the blood flow in patient-specific aneurysm geometries using the open-source library \command{foam-extend-4.0} with different blood rheology models. By comparing the flow parameters -- wall shear stress and flow velocity field -- between the results of the simulations, we assess the influence of these models on the hemodynamic of flow in intracranial aneurysms.
Keywords
Intracranial aneurysms, Numerical simulation, Blood rheology, Rupture
