  We recently demonstrated the reduction of the unified continuum and
variational multiscale formulation to a computationally efficient
fluid-structure interaction (FSI) formulation via three sound modeling
assumptions pertaining to the vascular wall. Similar to the coupled momentum
method introduced by Figueroa et al., the resulting semi-discrete formulation
yields a monolithically coupled FSI system posed in an Eulerian frame of
reference with only a minor modification of the fluid boundary integral. To
achieve uniform second-order temporal accuracy and user-controlled
high-frequency algorithmic damping, we adopt the generalized-$\alpha$ method
for uniform temporal discretization of the entire coupled system. In
conjunction with a fully consistent, segregated predictor multi-corrector
algorithm preserving the block structure of the incompressible Navier-Stokes
equations in the implicit solver's associated linear system, a three-level
nested block preconditioner is adopted for improved representation of the Schur
complement. In this work, we apply our reduced unified continuum formulation to
an appropriately prestressed patient-specific abdominal aortic aneurysm and
investigate the effects of varying spatial distributions of wall properties on
hemodynamic and vascular wall quantities of interest.
