Numerical simulation of pulsatile blood flow: a study with normal artery, and arteries with single and multiple stenosis

Md Alamgir Kabir,Md Ashraf Uddin,Md Ferdous Alam

doi:10.1186/s44147-021-00025-9

Md Alamgir Kabir, Md Ashraf Uddin + Show 1 more

Open Access

https://doi.org/10.1186/s44147-021-00025-9

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Abstract

Numerical simulations of pulsatile transitional blood flow through symmetric stenosed arteries with different area reductions were performed to investigate the behavior of the blood. Simulations were carried out through Reynolds averaged Navier-Stokes equations and well-known k-ω model was used to evaluate the numerical simulations to assess the changes in velocity distribution, pressure drop, and wall shear stress in the stenosed artery, artery with single and double stenosis at different area reduction. This study found a significant difference in stated fluid properties among the three types of arteries. The fluid properties showed a peak in an occurrence at the stenosis for both in the artery with single and double stenosis. The magnitudes of stated fluid properties increase with the increase of the area reduction. Findings may enable risk assessment of patients with cardiovascular diseases and can play a significant role to find a solution to such types of diseases.

Highlights

For the past few decades, cardiovascular diseases have become the third largest cause of mortality across the globe, where stenoses are of special concern [1, 2]
Similar results were found for the centerline axial velocity (Fig. 2c) and the Figure 3 shows the change in axial velocity in normal artery, and artery with single and double stenosis at different area reduction
Data from existing studies indicate that the arterial stenosis for patients with different area reduction is sufficiently defined

Summary

Introduction

For the past few decades, cardiovascular diseases have become the third largest cause of mortality across the globe, where stenoses are of special concern [1, 2]. Arterial stenosis leads to a significant variation in blood flow parameters, i.e., changes in the velocity gradients and flow structure. In most of the cases, blood flows are considered as laminar [3]. It may turn out to turbulent as the intensity of the perturbation of the blood flow created by stenosis. Due to high blood flow velocity at the throat of the stenosis, there may arise high shear stress that causes serious damage to the arterial walls. This affects the behaviors of blood flow [4]

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