TY - GEN
T1 - Fluid-structure interaction modeling of artery aneurysms with steady-state configurations
AU - Aulisa, Eugenio
AU - Bornia, Giorgio
AU - Calandrini, Sara
N1 - Publisher Copyright:
© 2017 International Center for Numerical Methods in Engineering. All rights reserved.
PY - 2017
Y1 - 2017
N2 - This paper addresses numerical simulations of fluid-structure interaction (FSI) problems involving artery aneurysms, focusing on steady-state configurations. Both the fluid flow and the hyperelastic material are incompressible. A monolithic formulation for the FSI problem is considered, where the deformation of the fluid domain is taken into account according to an Arbitrary Lagrangian Eulerian (ALE) scheme. The numerical algorithm is a Newton-Krylov method combined with geometric multigrid preconditioner and smoothing based on domain decomposition. The system is modeled using a specific equation shuffling that aims at improving the row pivoting. Due to the complexity of the operators, the exact Jacobian matrix is evaluated using automatic differentiation tools. We describe benchmark settings which shall help to test and compare different numerical methods and code implementations for the FSI problem in hemodynamics. The configurations consist of realistic artery aneurysms. A case of endovascular stent implantation on a cerebral aneurysm is also presented. Hybrid meshes are employed in such configurations. We show numerical results for the described aneurysm geometries for steady-state boundary conditions. Parallel implementation is also addressed.
AB - This paper addresses numerical simulations of fluid-structure interaction (FSI) problems involving artery aneurysms, focusing on steady-state configurations. Both the fluid flow and the hyperelastic material are incompressible. A monolithic formulation for the FSI problem is considered, where the deformation of the fluid domain is taken into account according to an Arbitrary Lagrangian Eulerian (ALE) scheme. The numerical algorithm is a Newton-Krylov method combined with geometric multigrid preconditioner and smoothing based on domain decomposition. The system is modeled using a specific equation shuffling that aims at improving the row pivoting. Due to the complexity of the operators, the exact Jacobian matrix is evaluated using automatic differentiation tools. We describe benchmark settings which shall help to test and compare different numerical methods and code implementations for the FSI problem in hemodynamics. The configurations consist of realistic artery aneurysms. A case of endovascular stent implantation on a cerebral aneurysm is also presented. Hybrid meshes are employed in such configurations. We show numerical results for the described aneurysm geometries for steady-state boundary conditions. Parallel implementation is also addressed.
KW - Cerebral aneurysms
KW - Fluid-structure interaction
KW - Incompressible Navier-Stokes equations
KW - Intracranial stent
UR - http://www.scopus.com/inward/record.url?scp=85045113352&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:85045113352
T3 - Proceedings of the 7th International Conference on Coupled Problems in Science and Engineering, COUPLED PROBLEMS 2017
SP - 616
EP - 627
BT - Proceedings of the 7th International Conference on Coupled Problems in Science and Engineering, COUPLED PROBLEMS 2017
A2 - Papadrakakis, Manolis
A2 - Onate, Eugenio
A2 - Schrefler, Bernhard A.
PB - International Center for Numerical Methods in Engineering
T2 - 7th International Conference on Coupled Problems in Science and Engineering, COUPLED PROBLEMS 2017
Y2 - 12 June 2017 through 14 June 2017
ER -