Eventos Anais de eventos
COBEM 2019
25th International Congress of Mechanical Engineering
VORTEX IDENTIFICATION AND HEMODYNAMICS PATTERNS IN THE ASCENDING AORTA DURING A CARDIAC CYCLE OF A PATIENT-SPECIFIC PHANTOM
Submission Author:
ivan fernney ibanez aguilar , RJ
Co-Authors:
ivan fernney ibanez aguilar, BRUNO AZEVEDO, Angela Nieckele
Presenter: ivan fernney ibanez aguilar
doi://10.26678/ABCM.COBEM2019.COB2019-0312
Abstract
The main goal of this study is to numerically investigate hemodynamic patterns and coherent structures (vortex) during a complete cardiac cycle in the ascending aorta and aortic arch of a particular patient, who had an artificial valve implanted since he suffered of an aortic stenosis. A 3D model was generated from computed tomography angiography and image segmentation of the ascending aorta and aortic arch. The boundary conditions defined based on physiological bloody pressure and mass flow rates entering and leaving the aorta, respectively. The turbulence was modeled with the two-equation k-w SST model. The geometrical vortex shape evolution in the cardiac cycle was discussed, also the analysis of wall shear stress (WSS) in the aortic wall was conducted. It is presented the effect of blood flow on the aortic wall during the cardiac cycle. Finally, it is shown that the vortex shape and the vortex location may have a relationship with the regions of high WSS.
Keywords
Vortex, Wall Shear Stress, CFD, Aortic stenosis, Cardiac cycle
