Eventos Anais de eventos
COBEM 2019
25th International Congress of Mechanical Engineering
EVALUATION OF TURBULENT PROPERTIES IN AORTAS WITH ASCENDING AORTIC ANEURYSM
Submission Author:
Gabriela de Castro Almeida , MG
Co-Authors:
Gabriela de Castro Almeida, Angela Nieckele, ivan fernney ibanez aguilar, BRUNO AZEVEDO, Pedro Teixeira, Ilan Gottlieb, Marcelo Melo
Presenter: Gabriela de Castro Almeida
doi://10.26678/ABCM.COBEM2019.COB2019-1362
Abstract
This research examines the flow within the aorta of two patients with aneurysm of the ascending aorta. For each patient, two tomography images that were performed at intervals of different years were obtained. By assessing the tomography images, it was observed that one of the patients presented a volumetric growth of the aneurysm and the other patient did not suffer alterations in relation to the size of the aneurysm. This study aims to assess the relationship between aneurysm growth or non-growth regarding to turbulence quantities such as turbulent kinetic energy and maximum turbulent shear stress. Three dimensional models were generated from computed tomography angiography and image segmentation of aortas. The flow was obtained with a commercial software, ANSYS Fluent v18.1. The turbulent flow was modeled with a two-equation turbulence model. It was verified that the results of the turbulent kinetic energy and the maximum principal Reynolds shear stress are quite similar. The patient with aneurysm growth presents high values of turbulent quantities in the incoming jet and near to the posterior wall, while the patient without the aneurysm growth presents lower values. The identification of particularities of the flow related to ascending aortic aneurysms obtained with the present analysis provides additional information to help patient diagnosis by doctors and it might help future patients in their medical treatments.
Keywords
Aneurysm, CFD, Turbulence, Hemodynamic
