Fluid-structure interaction modeling of artery aneurysms with steady-state configurations
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Inclou dades d'ús des de 2022
Cita com:
hdl:2117/190650
Tipus de documentText en actes de congrés
Data publicació2017
EditorCIMNE
Condicions d'accésAccés obert
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Abstract
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.
ISBN978-84-946909-2-1
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