Key result
Applying a static magnetic field increased pressure drop by 15% in simulated stenosed arteries, with diabetic blood models showing higher shear stress and pressure drop than healthy models.
Computational simulations demonstrate that non-Newtonian blood models and magnetic fields significantly alter wall shear stress and pressure drop in stenosed arteries, with diabetic blood increasing both parameters.
Newtonian models may bias hemodynamic predictions in stenosed arteries; leaves open validation of magnetic field effects in patient-specific simulations.
Pulsatile flow simulations of non-Newtonian blood flow in an axisymmetric multistenosed artery, subjected to a static magnetic field, are performed using FLUENT. The influence of artery size and magnetic field intensity on transient wall shear stress, mean shear stress, and pressure drop is investigated. Three different types of blood, namely, healthy, diabetic, and anemic are considered. It is found that using Newtonian viscosity model of blood in contrast to Carreau model underestimates the pressure drop and wall shear stress by nearly 34% and 40%, respectively. In addition, it is found that using a magnetic field increases the pressure drop by 15%. Generally, doubling the artery diameter reduces the wall shear stress approximately by 1.6 times. Also increasing the stenosis level from moderate to severe results in reduction of the shear stress by 1.6 times. Furthermore, doubling the diameter of moderately stenosed artery results in nearly 3-fold decrease in pressure drop. It is also found that diabetic blood results in higher shear stress and greater pressure drop in comparison to healthy blood, whereas anemic blood has a decreasing effect on both wall shear stress and pressure drop in comparison to healthy blood.
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Alshare et al. (2016) studied Stenosed Arteries. Static magnetic field and non-Newtonian blood models vs. No magnetic field and healthy blood models was evaluated on Pressure drop and wall shear stress. Applying a static magnetic field increased pressure drop by 15% in simulated stenosed arteries, with diabetic blood models showing higher shear stress and pressure drop than healthy models.
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