CFD Simulation Of Non-Newtonian Effect On Hemodynamics Characteristics Of Blood Flow

Zainudin, Siti Hajar (2019) CFD Simulation Of Non-Newtonian Effect On Hemodynamics Characteristics Of Blood Flow. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

Computational fluid dynamics (CFD) is a part of engineering in the mechanical field to study the pattern flow of fluid, heat transfer and anything that related to the operation of computer- based simulation. This project is to study Newtonian and non-Newtonian model of viscosity consequence on hemodynamic characteristics when blood flows through the nozzle by using CFD simulation. For the current study, it focusses on low Reynolds number (laminar) only. The current study focusses to compare between Newtonian and non-Newtonian and select which model is close to blood behavior. The results for this study will be on the axial velocity along the centerline of the nozzle, wall shear stress and pressure. For the validation process, a previously published paper was selected to performed test for validation by using Computational Fluid Dynamics software ANSYS FLUENT. After validation is done, it can be concluded that the work shows in this report served as early goals to provide simulation to use patient data by using implanted in-bodymedical devices that can obtain from CT scans or MRI technique. Hence, this report shows that CFD predictions can be validate and verify by axial velocity along centreline of the nozzle. Axial velocity for Newtonian viscosity is higher than non-Newtonian viscosity model. Besides that, Newtonian blood viscosity has a high number of wall shear stress and it will cause blood clots and thrombosis to the patient. When blood clot and thrombosis occurred, it can disturb the flow of blood from the recirculating system. When the process of transporting oxygen to the heart and the release of carbon dioxide from our body is being obstructed it can cause high blood pressure, high cholesterol and a heart condition, the rhythm of heart disturbance.

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