Abstract

Since the effect of magnetic fields on blood flow is not fully understood or studied comprehensively, this paper, for the first time, addresses the effect of uniform magnetic fields with different intensities on the pulsatile non-Newtonian blood flow in an elastic artery with axially symmetrical single and double stenoses using the commercial software COMSOL Multiphysics 5.1. The results are suggestive that an increase in the percent stenosis increases the pressure drop, which is more dramatic in double stenosis. Moreover, for a given percent stenosis, increasing the Hartmann (Ha) number, in addition to increasing the pressure drop, increases the amount by which the pressure drop is raised. The shear stress results revealed that increasing the magnetic field intensity results in the reduction of the vortex region formed in the back of the stenosis, reducing the area prone to disease, which can resolve pathological issues. The impact of the magnetic field was found to be decreased by increasing the percent stenosis. It was also observed that the percentage difference between the maximum wall shear stresses for various percent stenoses is reduced by increasing the Ha number for both single and double stenoses.

Graphic abstract

中文翻译：

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均匀磁场对弹性狭窄动脉中搏动性非牛顿血流的影响

摘要

由于尚未完全了解或全面研究磁场对血流的影响，本文首次探讨了不同强度的均匀磁场对轴向对称的弹性动脉中脉动非牛顿血流的影响使用商业软件COMSOL Multiphysics 5.1进行单支和双支狭窄。结果表明狭窄百分比的增加会增加压降，这在双重狭窄中更为明显。此外，对于给定的狭窄百分比，增加Hartmann（Ha）数除了增加压降外，还增加了压降增加的量。剪切应力结果表明，增加磁场强度会导致狭窄后部形成的涡流区域减小，减少容易发生疾病的区域，可以解决病理问题。发现通过增加狭窄百分比可以减小磁场的影响。还观察到，通过增加单一和双重狭窄的Ha值，减小了不同狭窄程度的最大壁切应力之间的百分比差异。

图形摘要