000021514 001__ 21514
000021514 005__ 20170622131249.0
000021514 04107 $$aeng
000021514 046__ $$k2017-06-15
000021514 100__ $$aAulisa, Eugenio
000021514 24500 $$aFLUID-STRUCTURE SIMULATIONS AND BENCHMARKING OF ARTERY ANEURYSMS UNDER PULSATILE BLOOD FLOW

000021514 24630 $$n6.$$pComputational Methods in Structural Dynamics and Earhquake Engineering
000021514 260__ $$bNational Technical University of Athens, 2017
000021514 506__ $$arestricted
000021514 520__ $$2eng$$aIn this paper Fluid-structure interaction (FSI) simulations of artery aneurysms are carried out where both the fluid flow and the hyperelastic material are incompressible. We focus on time-dependent formulations adopting a monolithic approach, where the deformation of the fluid domain is taken into account according to an Arbitrary Lagrangian Eulerian (ALE) scheme. The exact Jacobian matrix is implemented by using automatic differentiation tools. The system is modeled using a specific equation shuffling that assures an optimal pivoting. We propose to solve the resulting linearized system at each nonlinear outer iteration with a GMRES solver preconditioned by a geometric multigrid algorithm with an Additive Schwarz Method (ASM) smoother. In order to test our numerical method on possible hemodynamics applications, we describe several benchmark settings. The configurations consist of realistic artery aneurysms where hybrid meshes are employed. Both two and three-dimensional benchmarks are considered. We show numerical results for the described aneurysm geometries focusing on pulsatile inflow conditions. Parallel implementation is addressed and a case of endovascular stent implantation on a cerebral aneurysm is presented.

000021514 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000021514 653__ $$aCerebral aneurysms, Incompressible Navier-Stokes equations, Fluid-structure interaction, Intracranial stent.

000021514 7112_ $$aCOMPDYN 2017 - 6th International Thematic Conference$$cRhodes Island (GR)$$d2017-06-15 / 2017-06-17$$gCOMPDYN2017
000021514 720__ $$aAulisa, Eugenio$$iCalandrini, Sara$$iBornia, Giorgio
000021514 8560_ $$ffischerc@itam.cas.cz
000021514 8564_ $$s713501$$uhttps://invenio.itam.cas.cz/record/21514/files/16788.pdf$$yOriginal version of the author's contribution as presented on CD, section: [MS10] Advances in Numerical Methods for Linear and Non-Linear Dynamics and Wave Propagation
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000021514 962__ $$r21500
000021514 980__ $$aPAPER