Investigation of Brain Aneurysm Hemodynamic Structures from Both Newtonian And Non-Newtonian Type of Fluid Cases Using Computational Fluid Dynamics
Tarih ve Saat
29 Kasım 2017 - 12:00
In today’s technology blood vessel structures can be obtained with a variety of methods and it is possible now to import these structures into the solid modelling. With the help of imported geometries, modelling of computational fluid dynamics (CFD) can be applied and patient specific solutions can be developed. In this study, in similar manner blood vessel images were obtained from a patient and the geometry was cleaned so that only brain aneurysm region was ready to use. Viscosity of blood was defined in CFD model with three different ways: Newtonian type, Non-Newtonian Power Law and Non-Newtonian Carreu. Velocity vectors, variation in pressure drop and wall shear stresses identifying the hemodynamic structure of aneurysm region were calculated with the help of CFD models. The results were presented with pictures and necessary evaluations about the results were discussed. Besides, the effect of viscosity definition in CFD modelling on obtained results was also identified and reported. When blood was modelled with a Newtonian type fluid, the velocity vector values were appeared to be higher in the aneurysm region compared
to the Non-Newtonian modelling of the blood. On the other hand, pressure variation and wall shear stress in the aneurysm region were obtained to be larger for the Non-Newtonian
blood modelling compared to the Newtonian blood modelling.
Oktay Fırat Ural received his B.S. degree in Mechanical Engineering from Yeditepe University in 2016. He started his graduate education in Yeditepe University. He worked on combustion simulation in his graduation project. He is currently investigating the effect of the blood viscosity model and the effect of velocity profile on the CFD about the brain aneurysms. He is currently a Research Assistant at Yeditepe University.