Numerical study of bifurcation blood flows using three different non-Newtonian constitutive models

Abugattas, C.; Aguirre, A.; Castillo, Ernesto; Cruchaga, Marcela

doi:10.1016/j.apm.2020.06.066

Cited by 37 publications

(8 citation statements)

References 57 publications

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“…As shown in Table 1, in normal carotid artery, an increase of 2% and 3.5% and an increase of 3% and 5% in stenosed model is observed between Newtonian and Carreau Yasuda models, respectively. The Carreau-Yasuda model shows higher WSS compared to the Newtonian model due to higher velocity gradients, whereas the Newtonian model presents higher viscosities near the wall [17]. The magnitudes of WSS are significantly higher in the Carreau-Yasuda model in all the phases of the cardiac cycle due to the fact that the dynamic viscosity of the Carreau-Yasuda model stays significantly higher compared to the Newtonian fluid throughout the cardiac cycle.…”

Section: Discussionmentioning

confidence: 89%

“…Guerra et al [16] used Cross and Carreau-Yasuda models along with the Data Assimilation approach and could successfully reconstruct flow profiles on 3D arterial models. Abugattas et al [17] used a variational multiscale finite element approach to study the flow through bifurcations by comparing the behaviour of three constitutive rheological models, viz. power law, Cross and Carreau-Yasuda model.…”

Section: Introductionmentioning

confidence: 99%

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Influence of blood pressure and rheology on oscillatory shear index and wall shear stress in the carotid artery

Kumar

Pai

Khader

et al. 2022

J Braz. Soc. Mech. Sci. Eng.

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Atherosclerosis is a localized complication dependent on both the rheology and the arterial response to blood pressure. Fluid–structure interaction (FSI) study can be effectively used to understand the local haemodynamics and study the development and progression of atherosclerosis. Although numerical investigations of atherosclerosis are well documented, research on the influence of blood pressure as a result of the response to physio–social factors like anxiety, mental stress, and exercise is scarce. In this work, a three-dimensional (3D) Fluid–Structure Interaction (FSI) study was carried out for normal and stenosed patient-specific carotid artery models. Haemodynamic parameters such as Wall Shear Stress (WSS) and Oscillatory Shear Index (OSI) are evaluated for normal and hypertension conditions. The Carreau–Yasuda blood viscosity model was used in the FSI simulations, and the results are compared with the Newtonian model. The results reveal that high blood pressure increases the peripheral resistance, thereby reducing the WSS. Higher OSI occurs in the region with high flow recirculation. Variation of WSS due to changes in blood pressure and blood viscosity is important in understanding the haemodynamics of carotid arteries. This study demonstrates the potential of FSI to understand the causes of atherosclerosis due to altered blood pressures.

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Section: Discussionmentioning

confidence: 89%

Section: Introductionmentioning

confidence: 99%

Influence of blood pressure and rheology on oscillatory shear index and wall shear stress in the carotid artery

Kumar

Pai

Khader

et al. 2022

J Braz. Soc. Mech. Sci. Eng.

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show abstract

“…Particularly, the narrowing or obstruction of arteries due to build up plaque is the major cause of the diseases. Carotid artery bifurcation which forks the blood flow into two, Internal Carotid Artery (ICA) and External Carotid Artery (ECA) are seriously affected by atherosclerosis due to its geometry that allows plaque to deposit easily compared to a straight blood flow [1]. Computational Fluid Dynamics (CFD) numerical simulation is a valid approach to solve and analyze problems that involve blood flow, since it can replicate results in agreement with those obtained in in-vivo studies [24].…”

Section: Introductionmentioning

confidence: 97%

Pulsatile CFD Numerical Simulation to investigate the effect of various degree and position of stenosis on carotid artery hemodynamics

Subramaniam¹,

Rasani²

2022

ARASET

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This study is intended to investigate the effect of various degree and position (pre-bifurcation and post-bifurcation) of stenosis on carotid artery hemodynamics trough realistic CFD numerical simulations with appropriate turbulence model. The blood rheological properties were assumed as incompressible and Newtonian fluid. A 3 dimensional model of a non-stenotic carotid artery model was used this investigation. Several turbulence model were tested. The non-stenotic artery geometry was altered as 30% and 70%pre-bifurcation stenosis model, 30% and 70% post-bifurcation stenosis model. Pulsatile simulations were conducted for the non-stenotic and each stenotic artery models. The SST k-ω with Low-Reynolds number was found to be more appropriate for the simulation. As the degree of pre-bifurcation stenosis increases from 30% to 70%, the ICA maximum velocity increases from 12% to 65%. Also, the ECA maximum velocity increases from 5% to 45%. Besides, the ICA velocity ratio decreases by 22% but the ECA velocity ratioincreases by 101%. As the degree of post-bifurcation stenosis increases, the ICA maximum velocity takes a longer time to decrease after the peak systole velocity and the ECA maximum velocity becomes higher than a non-stenotic artery throughout the cardiac cycle. A mild stenosis at post-bifurcation does not show much effect on the carotid artery hemodynamics. However, even a mild stenosis at pre-bifurcation resulted in fluctuating maximum velocity at both ICA and ECA, especially during the diastole of the cardiac cycle

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“…Numerical simulation of a non‐Newtonian fluid in a T‐shape microchannel has been analyzed by Zimmerman et al 8 They noticed that by varying the channel size, it could be possible to control the flow phenomenon for the Carreau fluid even for a much larger range of time‐shear relaxation parameter values. The simulation of bifurcation of blood flow with three different constitutive models has been analyzed by Abugattas et al 9 Their results showed that power law fluid has a lower wall shear stresses, especially in near the walls as compared to those predicted by using Cross and Carreau–Yasuda models.…”

Section: Introductionmentioning

confidence: 99%

Numerical modeling of magnetohydrodynamic non‐Newtonian flow in a cross‐slot

Periyadurai,

Pascoa,

Abdollahzadehsangroudi

et al. 2024

Polymer Engineering & Sci

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This study numerically investigates the characteristics of a non‐Newtonian magnetohydrodynamic flow in a cross‐slot. Numerical simulations are performed using power law, Bird–Carreau and Casson non‐Newtonian fluid models. The flow characteristics and shear viscosity behavior in the flow region are analyzed for different values of magnetic field. Additionally, the dynamic behavior of the bifurcated flow in the cross‐slot is studied in detail, and the computational results are compared with existing models. It is shown that the fluid velocity is reduced in both the inlet and outlet channels of the cross‐slot due to the magnetic field, regardless of the viscosity model. Moreover, it is found that the fluid viscosity increases along the centerline of the inlet channels and decreases in the outlet channels of the cross‐slot for all non‐Newtonian fluid models tested here. Furthermore, this study shows that the flow properties of the non‐Newtonian fluids can be controlled by changing the magnetic field strength. The results of this study will be useful for analyzing the flow behavior of blood in a microfluidic cross‐slot and other rheological fluids used in biochemical engineering and industrial processes, where higher mass transfer and mixing efficiency can be achieved by imposing an external magnetic field.Highlights Simulation of non‐Newtonian magnetohydrodynamic flow in a cross‐slot is conducted. Analysis of the flow and shear viscosity behavior for different Hartman number is performed. Flow properties were successfully controlled with the imposed external magnetic field.

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Numerical study of bifurcation blood flows using three different non-Newtonian constitutive models

Cited by 37 publications

References 57 publications

Influence of blood pressure and rheology on oscillatory shear index and wall shear stress in the carotid artery

Influence of blood pressure and rheology on oscillatory shear index and wall shear stress in the carotid artery

Pulsatile CFD Numerical Simulation to investigate the effect of various degree and position of stenosis on carotid artery hemodynamics

Numerical modeling of magnetohydrodynamic non‐Newtonian flow in a cross‐slot

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