https://doi.org/10.1140/epjp/s13360-026-07488-w
Regular Article
Computational characterization of geometry-driven hemodynamics in intracranial aneurysms
1
College of Engineering, Department of Mechanical Engineering, Najran University, P.O Box 1988, King Abdulaziz Road, Najran, Saudi Arabia
2
College of Engineering, Imam Mohammad Ibn Saud Islamic University (IMSIU), Riyadh, Saudi Arabia
3
Department of Civil Engineering, College of Engineering, Cihan University-Erbil, Erbil, Iraq
4
Department of Radiology Techniques, Health and Medical Techniques College, Alnoor University, Nineveh, Iraq
5
College of Pharmacy, Gilgamesh Ahliya University, Baghdad, Iraq
6
College of Nursing, National University of Science and Technology, Dhi Qar, Iraq
7
Pharmacy College, Al-Farahidi University, Baghdad, Iraq
a
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b
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Received:
5
December
2025
Accepted:
22
February
2026
Published online:
18
March
2026
Abstract
This study uses computational fluid dynamics (CFD) to examine how aneurysm geometry and age affect intracranial aneurysm hemodynamic at peak systolic conditions. Four patient-specific cases were analyzed via computational approach. The Navier–Stokes equations were solved using a finite-volume approach with blood modeled as an incompressible, non-Newtonian Casson fluid. The results of computational modeling revealed that larger ostium areas and longer aneurysm centreline lengths produce stronger inflow jets, higher wall pressures, and more complex vortical flow patterns. Younger cases (20–39 years) exhibited higher velocities and pressure drops as a consequence of the steeper systolic upstroke and higher peak inflow velocities prescribed in the age-specific inlet waveform. A strong correlation was found between aneurysm length and maximum oscillatory shear index (OSI), with high OSI regions concentrated near the dome and inflow zones—areas prone to rupture. Overall, the results demonstrate that aneurysm shape and age-related vascular properties critically influence flow stability and rupture risk. Flow visualization showed that younger arteries (20–39 years) exhibited higher velocities and pressure drops due to the steeper systolic upstroke and higher peak inflow velocities prescribed in the age-specific inlet waveform.
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© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2026
Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
