Amirkabir University of Technology Amirkabir Journal of Mechanical Engineering 2008-6032 51 6 2020 02 20 Numerical Study of the Hemodynamic Parameters of Y-Bypass Graft at Rest and Exercise State Numerical Study of the Hemodynamic Parameters of Y-Bypass Graft at Rest and Exercise State 1325 1338 2764 10.22060/mej.2017.12944.5479 FA Ghassem Heidarinejad Hamidreza Babakhani tmu Alireza Rostami Arak Journal Article 2017 05 30 The simulation of blood flow in bypass grafts can help medical evaluation. Numerical simulation of blood flow in Configurations recommended by the surgeon Such as the configurations of Y is the aim of this study in order to predict hemodynamic parameters of this configuration in a patient with double stenosis 65 and 50 percent is examined at rest and during exercise. The computational domain was created from CT images from the human cardiac. In this study, blood is assumed homogeneous, non-Newtonian and pulsatile. For real modeling of flow and blood pressure, lumped model is used in outlet at rest and exercise states.The results indicate using this configuration is compensated the pressure drop and flow and time average wall shear stress has reduced in stenosis region and oscillatory shear index and relative residence time range has reduced in area pre and post-stenosis.Y bypass grafting investigation indicates time average wall shear is low at the bifurcation graft and There is possibility of creating restenosis in these areas, but These parameters are in the ideal range at the exercise state. The simulation of blood flow in bypass grafts can help medical evaluation. Numerical simulation of blood flow in Configurations recommended by the surgeon Such as the configurations of Y is the aim of this study in order to predict hemodynamic parameters of this configuration in a patient with double stenosis 65 and 50 percent is examined at rest and during exercise. The computational domain was created from CT images from the human cardiac. In this study, blood is assumed homogeneous, non-Newtonian and pulsatile. For real modeling of flow and blood pressure, lumped model is used in outlet at rest and exercise states.The results indicate using this configuration is compensated the pressure drop and flow and time average wall shear stress has reduced in stenosis region and oscillatory shear index and relative residence time range has reduced in area pre and post-stenosis.Y bypass grafting investigation indicates time average wall shear is low at the bifurcation graft and There is possibility of creating restenosis in these areas, but These parameters are in the ideal range at the exercise state. https://mej.aut.ac.ir/article_2764_98d8a23fd60826a2a474c5b4f5811707.pdf