Pulsatile flow of thixotropic blood in artery under external body acceleration

Louiza Cheffar, Abdelhakim Benslimane, Djamel Sadaoui, Adel Benchabane and Karim Bekkour

Computer Methods in Biomechanics and Biomedical Engineering, 2023, vol. 26, issue 8, 927-940

Abstract: This work presents a numerical technique for simulating non-Newtonian blood flow in human’s arteries driven by an oscillating pressure gradient. The blood is considered as a thixotropic fluid and its structural properties are considered to obey Moore’s thixotropic model as a constitutive equation. The equations of motion are simplified considering the flow laminar, axisymmetric and the fluid incompressible. A numerical solution is presented using finite difference method in order to compute the velocity field and wall shear stress distribution. The numerical results obtained have been validated with the analytical solution available in the literature. Furthermore, the effect of the structural properties, the average of the pressure gradient and the external acceleration on the velocity and wall shear stress distribution is investigated. These results reveal the influence of the different parameters studied on the pipe flow response of the thixotropic fluid.

Date: 2023
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DOI: 10.1080/10255842.2022.2098677

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