Finite Element Analysis And Numerical Simulation Of Aneurysm

In the paper, analyzed the 2-D aneurysm’s mathematical model by arbitrary Lagrangian- Euler finite element method(fem) and simulated 2-d aneurysm model of different shapes with the help of computer software. Then analyze the effects of geometric factors on the hemodynamic of aneurysm.In the paper, there are 16 aneurysm of different shapes which simulated under the same conditions in this paper. We can get the following results through comparative analysis of the blood flow within aneurysm. First, the distribution of velocity and pressure in the aneurysm and parent artery is very similar at different times, and the maximum and minimum velocity and pressure are also achieved in the same area. Second, when the aneurysm’s diameter and AR values both are small, blood flow within the aneurysm is very slow, nearly stagnant. While the increasing of diameter or AR value will accelerate arterial blood flow within the aneurysm.When increase to a certain extent, occur circulation phenomenon in the aneurysm. And when the aneurysm’s cross-sectional shape nearly circular, the annular circulation also showed more regular, but if the diameter or AR value continues to increase, circulation may become irregular or disappear. When aneurysm’s diameter or AR value is small, most area in the aneurysm are isobaric state. With the increasing of the diameter and AR value, the pressure distribution Law in the aneurysm is a gradient increases from the center of the aneurysm towards the wall, and the closer circular cross section is, the more stable pressure distribution is. On the contrary, the more irregular shape and pressure distribution is more unstable.