Abstract In numerical studies of blood flow in aneurysms, it is essential to consider movements of the arterial wall and their interactions with the fluid. Here, mechanics equations are augmented to an Euler–Lagrange formulation, facilitating the study of blood flow in a pathological geometry during the cardiac cycle. The arterial morphology and pulse are represented by the transformation of the system of equations into a body-fitted approach via generalized curvilinear coordinates (GCCs). Dynamic three-dimensional (3D) governing partial differential equations (PDEs) are discretized with the finite-volume method (FVM) on a collocated grid. The results obtained with this mathematical model reveal that the pulsating wall influences the velocity field, with prominent recirculation zones. In addition, localized lateral pressure gradients are observed within the pathological region. Increased pulsatility causes large augmentations of the Reynolds and Womersley numbers, with divergence from the hydrodynamic case. Analysis of biomedical factors such as the time-averaged wall shear stress (TAWSS) and oscillatory shear index (OSI) on the oscillating boundary provides valuable insight into the shear forces on the arterial wall compared with rigid wall dynamics. These findings underscore the need to model fluid–structure interactions (FSIs) in the context of aneurysm progression and cardiovascular risk assessment and to consider these interactions in patient-based biomedical approaches.
Kyriakoudi et al. (Wed,) studied this question.