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

作者：Tezduyar Tayfun E^*; Takizawa Kenji; Brummer Tyler; Chen Peng R

来源：International Journal for Numerical Methods in Biomedical Engineering, 2011, 27(11): 1665-1710.

DOI：10.1002/cnm.1433

• cardiovascular fluid mechanics
• cerebral aneurysms
• fluid-structure interactions
• space-time methods
• special techniques

We provide an extensive overview of the core and special techniques developed earlier by the Team for Advanced Flow Simulation and Modeling (T 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 star AFSM and present a sample from a wide set of patient-specific cerebral-aneurysm models we computed recently.

• 出版日期2011-11