Analysis of Different Stenotic Geometries on Two-Phase Blood Flow

Abstract

There are many different mathematical models and solution techniques dealing with the blood flows. A twophase (liquid-solid) model solved by a perturbation method will be introduced. Effects of hematocrit, Reynolds number, area reduction, and different geometries of the stenotic channel are studied on the velocity, pressure gradient, and streamlines. The flow characteristics (velocity and pressure) give a great increase as the stenosis classified as a sever stenosis. It is found that, the stenosis geometry has a great effect on the pressure gradient in the axial direction, and also there is a change in velocity profile in each cross section of the geometry. The hematocrit has a noticed effect on the flow velocity and pressure gradient, in which as the hematocrit increases the maximum velocity decreases before the throat while it increased after that section.

Pulsatile nanofluid flow with variable pressure gradient and heat transfer in wavy channel

“…The dilation of aneurysms leads to a thicker boundary layer, resulting in lower shear stresses near the vessel wall. This decrease in shear stresses contributes to a lower pressure gradient across aneurysms, as opposed to the steeper pressure gradient across the stenosis, where the thinner boundary layer induces higher shear stresses and a more abrupt pressure gradient, and this observation agrees qualitatively well with 65 . Figure 4 depicts the variation of the pressure gradient along the length of the stenosis for different Hartmann number values.…”

“…In the case of steady flow, Fig. 2 shows a good agreement of the present results, specifically the variation of pressure gradient with axial distance 65 for the amplitude ratio parameter . with

Figure 2 Pressure gradient for various values of the amplitude ratio .

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“…For validation, the present results for the pulsatile flow of the base fluid (i.e. with ) are compared with those obtained by Abumandour et al 65 . In the case of steady flow, Fig.…”

“…This departure from the conventional one-dimensional approach is motivated by the need to comprehensively understand and address the limitations observed in current literature. Building upon the findings of Chow and Abumandour et al 64 , 65 , who highlighted significant pressure gradient variations, particularly in restricted channel length. This analysis considers the variations in pressure gradient, including the impact of magnetic field, nanoparticle volume fraction, radiation, and heat source parameters.…”