Numerical investigation of hematocrit variation effect on blood flow in an arterial segment with variable stenosis degree

Elhanafy, Ahmed; Elsaid, A.; Guaily, Amr

doi:10.1016/j.molliq.2020.113550

Cited by 22 publications

(5 citation statements)

References 29 publications

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“…The multiphase blood model was used to consider the shear thinning effect of blood according to the hematocrit [21,23]. The multiphase blood model calculates the mass, momentum, and energy exchange between two phase substances by assuming that red blood cells are solid in plasma.…”

Section: Governing Equationsmentioning

confidence: 99%

“…Ahmed Elhanafy et al [23], based on the Quemada model, presented a blood model that considers the viscosity according to the concentration of red blood cells and the viscoelastic effect using the Oldroyd-B model. However, this model also has a limitation in that it is difficult to consider the local concentration change according to the red blood cell because blood is assumed as the bulk fluid.…”

Section: Introductionmentioning

confidence: 99%

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Hemodynamic Analysis on the Anastomosis Angle in Arteriovenous Graft Using Multiphase Blood Model

Kim

Ryou

2021

Applied Sciences

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Numerical analysis was performed for the effect of the venous anastomosis angle in a forearm arteriovenous graft for hemodialysis using a multiphase blood model. The geometry of the blood vessel was generated based on the patient-computed tomography data. The anastomosis angles were set at 15°, 30°, and 45°. The hematocrit was set at 34%, 45%, and 58%. The larger anastomosis angle, high wall shear stress area >11 Pa, increases to the side of the vein wall away from the anastomosis site. Further, the relatively low wall shear stress area, <3 Pa, occurs near the anastomosis site in larger anastomosis angles. Therefore, the effect of high wall shear stress has advantages in the vicinity of the anastomosis, as the anastomosis angle is larger, but disadvantages as the distance from the anastomosis increases. Moreover, patients with low hematocrit are advantageous for WSS area.

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Section: Governing Equationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Hemodynamic Analysis on the Anastomosis Angle in Arteriovenous Graft Using Multiphase Blood Model

Kim

Ryou

2021

Applied Sciences

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“…This can lead to a number of problems, including pain, inflammation, and even death. Many studies have dealt with the study of blood flow in narrow and dilated arteries [18][19][20][21]. In recent years, there has been growing interest in the use of nanoparticles to improve blood flow in stenosis arteries [22][23][24].…”

Section: Introductionmentioning

confidence: 99%

MHD flow of the novel quadruple hybrid nanofluid model in a stenosis artery with porous walls and thermal radiation: A Sisko model‐based analysis

Omama,

Arafa,

Elsaid

et al. 2024

Z Angew Math Mech

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This study introduces a mathematical model that describes the Magnetohydrodynamics (MHD) flow of blood in a porous stenosis artery, incorporating a new hybrid nanofluid (HNF) model known as ‘Quadruple’ or the tetra‐(HNF) model. An innovative aspect of this study lies in the unexplored combination of tetra‐hybrid nanoparticles with the Sisko rheological model. The conventional Tiwari and Das (HNF) model has been expanded to accommodate the tetra‐(HNFs) case. To transform the governing partial differential equations into ordinary differential equations, a series of variable similarity transformations are employed. The resulting highly nonlinear simultaneous equations are efficiently solved using the shooting method. Numerical computations are conducted to investigate various parametric conditions, and graphs are utilized to visualize notable aspects of flow velocity and temperature. A comprehensive analysis is provided to illustrate the influence of flow parameters on wall shear stress and local Nusselt number, which are depicted through figures and tables. The study shows that the novel tetra‐HNF exhibits enhancements in blood flow when compared to nanofluids with a lower number of hybrids. Increasing the flow power index of non‐Newtonian Sisko model leads to improve convective heat transfer. Furthermore, parameters such as porosity, thermal radiation, and magnetic effects exhibit noticeable impacts on blood flow, temperature, and associated risks in constricted arteries.

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“…These have become an important tool for assessing and forecasting the onset of disease, as well as examining the effectiveness of novel technologies for its treatment. Some drawbacks of hemodynamic experimental procedures can be resolved by computational models, which have the capacity to create more realistic virtual models, provide rapid and reliable findings, and completely examine varied physiological circumstances [ 33 , 40 – 43 ]. Nevertheless, this does not signify that those models can totally substitute actual studies, as accurate blood flow modelling remains a difficult task [ 44 ].…”

Section: Introductionmentioning

confidence: 99%

A review on non-Newtonian fluid models for multi-layered blood rheology in constricted arteries

Wajihah

Sankar

2023

Arch Appl Mech

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Haemodynamics is a branch of fluid mechanics which investigates the features of blood when it flows not only via blood vessels of smaller/larger diameter, but also under normal as well as abnormal flow states, such as in the presence of stenosis, aneurysm, and thrombosis. This review aims to discuss the rheological properties of blood, geometry of constrictions, dilations and the emergence of single-layered fluid to four-layered fluid models. To discuss further the influence of the aforesaid parameters on the physiologically important flow quantities, the mathematical formulation and solution methodology of the two-layered and four layered arterial blood flow problems studied by the authors (Afiqah and Sankar in ARPN J Eng Appl Sci 15:1129--1143, 2020, Comput Methods Programs Biomed 199:105907, 2021. 10.1016/j.cmpb.2020.105907) are recalled. It should be pointed out that the increasing resistive impedance to flow in three distinct states encompassing healthy, anaemic, and diabetic demonstrates that the greater the restriction in the artery, very few blood is carried to the pathetic organs, leading to subjects’ death. It is also discovered that the pulsatile nature of blood movement produces a dynamic environment that poses a slew of intriguing and unstable fluid mechanical state. It is hoped that the intriguing results gathered from this literature survey and review conducted may help the medical practitioners to forecast blood behaviour mobility in stenotic arteries. Furthermore, the physiological information gathered from the available clinical data from the literature on patients diagnosed with diabetes and anaemia may be beneficial to doctors in deciding the therapeutic procedure for treating some particular cardiovascular disease.

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Numerical investigation of hematocrit variation effect on blood flow in an arterial segment with variable stenosis degree

Cited by 22 publications

References 29 publications

Hemodynamic Analysis on the Anastomosis Angle in Arteriovenous Graft Using Multiphase Blood Model

Hemodynamic Analysis on the Anastomosis Angle in Arteriovenous Graft Using Multiphase Blood Model

MHD flow of the novel quadruple hybrid nanofluid model in a stenosis artery with porous walls and thermal radiation: A Sisko model‐based analysis

A review on non-Newtonian fluid models for multi-layered blood rheology in constricted arteries

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