Space-time fluid-structure interaction modeling of patient-specific cerebral aneurysms

Tayfun E. Tezduyar, Kenji Takizawa, Tyler Brummer, Peng R. Chen

    Research output: Contribution to journalArticle

    78 Citations (Scopus)

    Abstract

    We provide an extensive overview of the core and special techniques developed earlier by the Team for Advanced Flow Simulation and Modeling (T{black star}AFSM) for space-time fluid-structure interaction (FSI) modeling of patient-specific cerebral aneurysms. The core FSI techniques are the Deforming-Spatial-Domain/Stabilized Space-Time (DSD/SST) formulation and the stabilized space-time FSI (SSTFSI) technique. The special techniques include techniques for calculating an estimated zero-pressure (EZP) arterial geometry, a special mapping technique for specifying the velocity profile at an inflow boundary with non-circular shape, techniques for using variable arterial wall thickness, mesh generation techniques for building layers of refined fluid mechanics mesh near the arterial walls, a recipe for pre-FSI computations that improve the convergence of the FSI computations, the Sequentially-Coupled Arterial FSI (SCAFSI) technique and its multiscale versions, techniques for the projection of fluid-structure interface stresses, calculation of the wall shear stress (WSS) and calculation of the oscillatory shear index (OSI) and arterial-surface extraction and boundary condition techniques. We show how these techniques work with results from earlier computations. We also describe the arterial FSI techniques developed and implemented recently by the T{black star}AFSM and present a sample from a wide set of patient-specific cerebral-aneurysm models we computed recently.

    Original languageEnglish
    Pages (from-to)1665-1710
    Number of pages46
    JournalInternational Journal for Numerical Methods in Biomedical Engineering
    Volume27
    Issue number11
    DOIs
    Publication statusPublished - 2011 Nov

    Fingerprint

    Cerebral Aneurysm
    Fluid structure interaction
    Intracranial Aneurysm
    Space-time
    Fluid
    Interaction Techniques
    Interaction
    Modeling
    Mechanics
    Arterial Pressure
    Stars
    Star
    Mesh generation
    Fluid mechanics
    Flow simulation
    Patient-Specific Modeling
    Wall Shear Stress
    Fluid Mechanics
    Mesh Generation
    Shear stress

    Keywords

    • Cardiovascular fluid mechanics
    • Cerebral aneurysms
    • Fluid-structure interactions
    • Space-time methods
    • Special techniques

    ASJC Scopus subject areas

    • Computational Theory and Mathematics
    • Software
    • Applied Mathematics
    • Modelling and Simulation
    • Biomedical Engineering
    • Molecular Biology

    Cite this

    Space-time fluid-structure interaction modeling of patient-specific cerebral aneurysms. / Tezduyar, Tayfun E.; Takizawa, Kenji; Brummer, Tyler; Chen, Peng R.

    In: International Journal for Numerical Methods in Biomedical Engineering, Vol. 27, No. 11, 11.2011, p. 1665-1710.

    Research output: Contribution to journalArticle

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