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Space–time finite element computation of arterial fluid–structure interactions with patient‐specific data
Author(s) -
Takizawa Kenji,
Christopher Jason,
Tezduyar Tayfun E.,
Sathe Sunil
Publication year - 2010
Publication title -
international journal for numerical methods in biomedical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.741
H-Index - 63
eISSN - 2040-7947
pISSN - 2040-7939
DOI - 10.1002/cnm.1241
Subject(s) - computation , inflow , fluid–structure interaction , finite element method , geometry , convergence (economics) , focus (optics) , fluid mechanics , mathematics , mechanics , computer science , algorithm , physics , engineering , structural engineering , optics , economics , economic growth
The stabilized space–time fluid–structure interaction (SSTFSI) technique developed by the team for advanced flow simulation and modeling is applied to the computation of arterial fluid–structure interaction (FSI) with patient‐specific data. The SSTFSI technique is based on the deforming‐spatial‐domain/stabilized space–time formulation and is supplemented with a number of special techniques developed for arterial FSI. These include a recipe for pre‐FSI computations that improve the convergence of the FSI computations, using an estimated zero‐pressure arterial geometry, layers of refined fluid mechanics mesh near the arterial walls, and a special mapping technique for specifying the velocity profile at an inflow boundary with non‐circular shape. In the test computations reported here, we focus on a patient‐specific middle cerebral artery segment with aneurysm, where the arterial geometry is based on computed tomography images. Copyright © 2009 John Wiley & Sons, Ltd.