Dynamical behaviour of non newtonian spiral blood flow through arterial stenosis

15th Asian Congress of Fluid Mechanics

物理学;力学

Ali, Mohammad^1 ; Hasan, Md. Mahmudul^1 ; Maruf, Mahbub Alam^1

Department of Mechanical Engineering, Bangladesh University of Engineering and Technology, Dhaka

1000, Bangladesh^1

关键词: Axial velocity component;    Dynamical behaviours;    Human circulatory systems;    Non-Newtonian fluids;    Numerical investigations;    Parabolic velocity profile;    Tangential components;    Turbulent kinetic energy;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/822/1/012072/pdf
DOI  :  10.1088/1742-6596/822/1/012072

学科分类：力学，机械学

来源: IOP

【 摘 要 】

The spiral component of blood flow has both beneficial and detrimental effects in human circulatory system. A numerical investigation is carried out to analyze the effects of spiral blood flow through an axisymmetric three dimensional artery having 75% stenosis at the center. Blood is assumed as a non-Newtonian fluid. Standard k-ω model is used for the simulation with the Reynolds number of 1000. A parabolic velocity profile with spiral flow is used as inlet boundary condition. The peak values of all velocity components are found just after stenosis. But total pressure gradually decreases at downstream. Spiral flow of blood has significant effects on tangential component of velocity. However, the effect is mild for radial and axial velocity components. The peak value of wall shear stress is at the stenosis zone and decreases rapidly in downstream. The effect of spiral flow is significant for turbulent kinetic energy. Detailed investigation and relevant pathological issues are delineated throughout the paper.