Numerical simulation of blood flow in a stented aneurysm using lattice Boltzmann method

Document Type : Research Article

Authors

Mechanical Engineering Group, Golpayegan College of Engineering, Isfahan University of Technology, Golpayegan, Iran

Abstract

An aneurysm is a local deformation of a blood vessel caused by high pressure and wall weakness. The rupture of the aneurysm leads to a cerebral hemorrhage and severe complications in the patient. Hemorrhagic brain stroke is one of the most prevalent causes of death by cardiovascular diseases and affects globally 15% of stroke patients. Recently, stent placement is considered a promising and minimally invasive technique to prevent the rupture of an aneurysm. The hemodynamic characteristics of the blood flow are affected by the aneurysm geometry and stent properties. In this study, the effect of the shape and size of the stent on the blood flow parameters are investigated numerically. The Lattice Boltzmann Method (LBM) is used in this simulation since it is useful for modeling complex fluid flow. The results show that with reduced pore size, speed and momentum in the aneurysm sac decrease, and stent-struts with a rectangular cross section perform the best. Additionally, the height of the stent is more effective in reducing the blood flow than the width of the stent.

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