Simulation of unsteady blood flow dynamics in the thoracic aorta

In this work, blood flow dynamics was analyzed in a realistic thoracic aorta (TA) model under unsteady-state conditions via velocity contours, secondary flow, pressure and wall shear stress (WSS) distributions. Our results demonstrated that the primary flow velocity is skewed towards the inner wall...

Full description

Autores:
Laín, Santiago
Caballero, Andres D.
Tipo de recurso:
Article of journal
Fecha de publicación:
2017
Institución:
Universidad Nacional de Colombia
Repositorio:
Universidad Nacional de Colombia
Idioma:
spa
OAI Identifier:
oai:repositorio.unal.edu.co:unal/67558
Acceso en línea:
https://repositorio.unal.edu.co/handle/unal/67558
http://bdigital.unal.edu.co/68587/
Palabra clave:
62 Ingeniería y operaciones afines / Engineering
Blood flow
computational fluid dynamics
hemodynamics
thoracic aorta
wall shear stress
Flujo sanguíneo
dinámica de fluidos computacional
hemodinámica
aorta torácica
esfuerzos cortantes parietales
Rights
openAccess
License
Atribución-NoComercial 4.0 Internacional
Description
Summary:In this work, blood flow dynamics was analyzed in a realistic thoracic aorta (TA) model under unsteady-state conditions via velocity contours, secondary flow, pressure and wall shear stress (WSS) distributions. Our results demonstrated that the primary flow velocity is skewed towards the inner wall of the ascending aorta; but this skewness shifts towards the posterior wall in the aortic arch and then towards the anterior-outer wall in the descending aorta. Within the three arch branches, the flow velocity is skewed to the distal walls with flow reversal along the proximal walls. Strong secondary flow motion is observed in the TA, especially at the inlet of the arch branches. WSS is highly dynamic, but was found to be the lowest along the proximal walls of the arch branches. Finally, pressure was found to be low along the inner aortic wall and in the proximal walls of the arch branches, and high around the three stagnation regions distal to the arch branches and along the outer wall of the ascending aorta.