TY - GEN
T1 - On the Importance of Modelling the Interplay Between the Blood Flow and the Aortic Wall in Ascending Thoracic Aortic Aneurysms
AU - Mourato, André
AU - Valente, Rodrigo
AU - Xavier, José
AU - Brito, Moisés
AU - Avril, Stéphane
AU - Tomás, António
AU - Fragata, José
N1 - Publisher Copyright:
© The Author(s), under exclusive license to Springer Nature Switzerland AG 2023.
PY - 2024/2
Y1 - 2024/2
N2 - The extensive reporting time is one of the main bottlenecks towards introducing numerical models to clinical practice. There is an open question regarding the importance of modelling blood-vessel interaction using Fluid–Structure Interaction (FSI) models, known to yield more accurate results but at the expense of increased computational requirements and, subsequently, longer reporting times. In this work, rigid and moving wall Computational Fluid Dynamics (CFD) and Reduced Order Models (ROM) were developed using SimVascular and compared with FSI to evaluate the impact of wall displacement on Ascending Thoracic Aortic Aneurysm (ATAA) hemodynamics. The numerical blood pressure estimated by the CFD and ROM simulations agreed with FSI. Regarding the numerical Wall Shear Stress (WSS), none of the simpler approaches were able to produce results similar to the FSI simulations. Afterwards, the impact of these changes on the numerical displacements was assessed by imposing different pressure boundary conditions on a Computational Solid Mechanics (CSM) model of the ATAA wall. These results also show a good correspondence with FSI. This suggests that a coupling between simpler approaches may be able to accurately simulate the biomechanics of ATAA.
AB - The extensive reporting time is one of the main bottlenecks towards introducing numerical models to clinical practice. There is an open question regarding the importance of modelling blood-vessel interaction using Fluid–Structure Interaction (FSI) models, known to yield more accurate results but at the expense of increased computational requirements and, subsequently, longer reporting times. In this work, rigid and moving wall Computational Fluid Dynamics (CFD) and Reduced Order Models (ROM) were developed using SimVascular and compared with FSI to evaluate the impact of wall displacement on Ascending Thoracic Aortic Aneurysm (ATAA) hemodynamics. The numerical blood pressure estimated by the CFD and ROM simulations agreed with FSI. Regarding the numerical Wall Shear Stress (WSS), none of the simpler approaches were able to produce results similar to the FSI simulations. Afterwards, the impact of these changes on the numerical displacements was assessed by imposing different pressure boundary conditions on a Computational Solid Mechanics (CSM) model of the ATAA wall. These results also show a good correspondence with FSI. This suggests that a coupling between simpler approaches may be able to accurately simulate the biomechanics of ATAA.
KW - Ascending thoracic aortic aneurysm (ATAA)
KW - Blood-vessel interaction
KW - Computational fluid dynamics (CFD)
KW - Computational solid mechanics (CSM)
UR - http://www.scopus.com/inward/record.url?scp=85187651328&partnerID=8YFLogxK
U2 - 10.1007/978-3-031-47790-4_22
DO - 10.1007/978-3-031-47790-4_22
M3 - Conference contribution
AN - SCOPUS:85187651328
SN - 978-3-031-47789-8
T3 - Lecture Notes in Bioengineering
SP - 233
EP - 243
BT - Proceedings of the 10th Congress of the Portuguese Society of Biomechanics
A2 - Martins Amaro, Ana
A2 - Roseiro, Luís
A2 - Messias, Ana Lúcia
A2 - Gomes, Beatriz
A2 - Almeida, Henrique
A2 - António Castro, Maria
A2 - Neto, Maria Augusta
A2 - de Fátima Paulino, Maria
A2 - Maranha, Vítor
PB - Springer
CY - Cham
T2 - 10th Congress of the Portuguese Society of Biomechanics, CNB 2023
Y2 - 5 May 2023 through 6 May 2023
ER -