Comparation of CFD-Computation Fluid Dynamics Analysis of Shorter Designed Stent Graft in Abdominal Aorta

摘要

This paper is sequel of the previous research about determining blood flow through new designed stent graft in abdominal aorta. The goal of this research is to show that a very short stent graft can significantly reduce pressure in the abdominal aorta, which can lead to savings in operating time, material and lower the quantity of artificial materials in the body of the patient. Methods of Computation Fluid Dynamics (or shorter CFD) were used to determine characteristics of blood flow in the abdominal aorta. CFD is a powerful tool, used for solving fluid flow problems in a variety of engineering disciplines such as hydraulic engineering, mechanical engineering, meteorology, environmental engineering, biomedical engineering and many more. During a CFD simulation, the fluid flow domain is divided in smaller sub regions. Afterwards, the governing equations of fluid flow are solved for each particle in an iterative process, which is conducted till the accomplishment of the desired residual error. After completing research regarding shortening of the existing length of stent and work based on 2d check ups and simulations we decided to do 3d models to try to confirm objectivity of the results. Comparing 2d and 3d results the clearer interpretation of results and design was shown. This confirmed the thesis that smaller stent dimensions can also present adequate treatment for this clinical state.