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Three-Dimensional Finite Element Computation For Solving Pulsatile Blood Flow: Relevence in Assessing the Flow Dynamics in Abdominal Aortic Aneurysm

Author(s): Vijayajothi Paramasivam | Nenad Filipovic | Mohammed Rafiq Abdul Kadir | Kanesan Muthusamy

Journal: CFD Letters
ISSN 2180-1363

Volume: 2;
Issue: 4;
Start page: 149;
Date: 2010;
Original page

Keywords: Three-dimensional finite element methods | Pulsatile flow dynamics | Abdominal aorta

The objective of this paper is to present the mixed velocity-pressure (v-p) finite element ‎method that solves the pulsatile blood flow in arteries. The solution exploits the Galerkin ‎method and the fully implicit incremental-iterative procedure for the three-dimensional ‎nonlinear finite element equations. This methodology is applied to model biological flows ‎that are important in predicting growth and rupture risks in abdominal aortic aneurysms ‎‎(AAA). The numerical technique was validated with the analytical solution of the ‎Womersley model. Next, a physiologically realistic pulsatile blood flow waveform was ‎imposed onto the idealized cylindrical arterial model and solved as a benchmark problem. ‎The model represents a healthy abdominal aorta. This pulsatile condition simulates an in ‎vivo aorta at rest. The numerical results were used to quantify clinically relevant flow ‎dynamics that play a significant role in today’s field of medical treatment planning and ‎development of predictive methods via computational modelling for assessing common ‎clinical problems such as AAAs.‎

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