Abstract
A cerebral aneurysm is a cerebrovascular condition affecting about 3 to 5 percent of the population, posing significant health risks. Rupture can result in death, with aneurysms greater than 7mm considered high risk and those less than 3mm low risk. However, size alone doesn’t determine rupture risk; location, shape, and individual health also play crucial roles. Computational fluid dynamics (CFD) analysis has advanced preventative medicine by providing valuable insights into aneurysm growth, rupture risk, and behavior, aiding early diagnosis and treatment. The accuracy of CFD depends on mesh quality in capturing flow properties. Improper meshing introduces challenges like lack of mesh independence and artificial flow disturbances, impacting accurate hemodynamic assessment. Computational costs increase with mesh size without necessarily improving accuracy due to numerical instability. Thus, meticulous meshing is crucial for reliable CFD simulations. This study investigates meshing effects on CFD results using ANSYS 2023 R2 Fluent with polyhedral meshes. A comparative study of five patient models assesses the impact of varying mesh quality on simulation accuracy. Uniform boundary conditions (blood pressure 120/80 mm Hg, healthy velocity inputs) are used to evaluate flow dynamics, wall shear stress (WSS), and pressure distribution, establishing an efficient and accurate simulation approach for aneurysm modeling.
