Computer Simulations of Pulsatile Blood Flow in Fusiform Models of Abdominal Aortic Aneurysms

Authors

  • P. Vijayajothi Faculty of Science and Technology, Open University Malaysia, MALAYSIA
  • M. Kanesan Faculty of Science and Technology, Open University Malaysia, MALAYSIA
  • M. Rafiq Abdul Kadir Medical Implant Technology Group (MediTeg), Faculty of Biomedical Engineering & Health Science, Universiti Teknologi Malaysia, MALAYSIA

Keywords:

computational modelling, flow dynamics, fusiform abdominal aortic aneurysms, pulsatile flow

Abstract

Flow dynamics have been investigated in model aneurysms under physiologically realistic pulsatile flow condition via computational modeling techniques. The computer simulations are based on finite element method. Vortex pattern emergence and evolution were evaluated. Throughout the bulge in all models regardless of size, the systolic flow was found to be forward-directed. Vortices were initially evident in the bulge during deceleration from peak systole and further expanded during the retrograde flow phase. Flow in larger models become increasingly unstable compared to smaller models. It was also noted that these unstable flow fields were much significant towards the distal half of the bulge models. This increased intensity of turbulent flow fields in larger models may contribute significantly to wall shear stress magnitude and subsequently contributing to higher rupture risks.

Published

2021-07-05
فروشگاه اینترنتی