In this project, a bifurcating vessel with non-Newtonian blood flow has been simulated. We know that blood is one of the most famous non-Newtonian fluids. Blood flow in vessels is one of the most studied and simulated flows in biomedical engineering. Simulating blood flow allows us to determine the shear stresses on the vessel wall caused by the flow velocity. Non-Newtonian blood flow simulation is significant and vital because a better understanding of these flows can help doctors and researchers diagnose and treat various diseases. For example, to perform effective calculations on blood flow in the vascular system, we need information about the physical properties of blood. Using simulation models, more accurate calculations can be made, and treatment methods can be improved based on these calculations.
In addition, non-Newtonian blood flow simulation helps us better understand the forces that affect the vessel. Moreover, with blood flow simulation, medical devices and equipment related to blood flow can be optimized. Another advantage of simulating non-Newtonian blood flow is the access to accurate and error-free data from blood flow for analysis and prediction of its effects on diseases such as atherosclerosis and drug transport, and also for designing medical devices.
The Herschel Bulkley non-Newtonian model has been used to define viscosity in this project. The project has been three-dimensionally simulated using Space Claim software to produce the geometry. The geometry meshing was done using ANSYS Meshing software, and the number of elements used for this project was 628761. The input velocity is set at 0.2 meters per second with a specified inlet velocity boundary condition. The solver used for this simulation is pressure-based, and the simulation was conducted in steady-state mode. The Simple Method has been used to couple the velocity and pressure equations, which has a lower computational volume than the Coupled Method. If we can achieve convergence with this Method, it is our priority to use it.
After simulating and achieving full convergence, we can observe the speed and pressure contours.
We can also see the shear stress created by the velocity gradient in the boundary layer on the graph or meter. We know that blood flow in vessels is pulsatile. We can perform this simulation for various speeds and pulses to better examine the expected results. If you purchase this product, we can also simulate the pulsatile velocity modes for you free of charge.