Numerical simulation of blood pulsatile flow in a stenosed carotid artery using different rheological models

Razavi, Asma; Shirani, Ebrahim; Sadeghi, Mahmood

doi:10.1016/j.jbiomech.2011.04.023

Cited by 206 publications

(111 citation statements)

References 22 publications

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“…Nevertheless, both Sato et al [16] and Skow et al [17] used Doppler ultrasound and measured CBF velocity as a surrogate of CBF in healthy subjects. Doppler ultrasound as a method to estimate CBF is even more questionable in patients with chronic artery stenosis due to turbulent blood flow in the area of stenosis [7,11,14]. Therefore, our study, to the best of our knowledge, provides morphometric evaluation of the PCAs reactivity for the first time.…”

Section: Discussionmentioning

confidence: 90%

Morphometric evaluation of the delayed cerebral arteries response to acetazolamide test in patients with chronic carotid artery stenosis using computed tomography angiography

et al. 2017

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Section: Discussionmentioning

confidence: 90%

Morphometric evaluation of the delayed cerebral arteries response to acetazolamide test in patients with chronic carotid artery stenosis using computed tomography angiography

et al. 2017

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“…Chen et al [6] explored the non-Newtonian fluid flow in a stenosed coronary bypass numerically employing the Carreau-Yasuda model where they revealed significant differences in axial velocity profiles, secondary flow streamlines, 2 Journal of Fluids and wall shear stress (WSS) between the non-Newtonian and Newtonian fluid flows. Moreover, the effects of both non-Newtonian behavior and the pulsation of blood flow on the distributions of luminal surface low-density lipoprotein (LDL) concentration and oxygen flux along the wall of the human aorta were numerically analyzed by Liu et al [7] whereas Razavi et al [8] performed a numerical analysis to study the viscous effects of blood. The power-law model demonstrated higher deviations in terms of velocity and wall shear stress compared to Newtonian and six other non-Newtonian viscosity models in their investigation.…”

Section: Introductionmentioning

confidence: 99%

Rheological Behavior of Physiological Pulsatile Flow through a Model Arterial Stenosis with Moving Wall

2015

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The paper presents a numerical investigation of non-Newtonian modeling effects on unsteady periodic flows in a two-dimensional (2D) constricted channel with moving wall using finite volume method. The governing Navier-Stokes equations have been modified using the Cartesian curvilinear coordinates to handle complex geometries, such as, arterial stenosis. The physiological pulsatile flow has been used at the inlet position as an inlet velocity. The flow is characterized by the Reynolds numbers 300, 500, and 750 that are appropriate for large arteries. The investigations have been carried out to characterize four different non-Newtonian constitutive equations of blood, namely, the (i) Carreau, (ii) Cross, (iii) Modified-Casson, and (iv) Quemada. In these four models, blood viscosity is a nonlinear function of shear rates. The Newtonian model has been investigated to study the physics of fluid and the results are compared with the non-Newtonian viscosity models. The numerical results are presented in terms of streamwise velocity, wall shear stress, pressure distribution as well as the vorticity, streamlines, and vector plots indicating recirculation zones at the poststenotic region. Comparison has also been illustrated in terms of wall pressure and wall shear stress for the Cross model considering different amplitudes of wall oscillation.

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“…In all of these cases, bubbles should move and grow in the blood stream and collapse in the intended location. The researches conducted on blood indicate that considering the blood to be a nonNewtonian fluid correlates well with the experimental results and hence, most of the models presented for fluid field analysis assume the blood to be a nonNewtonian fluid [10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 53%

Chaotic behavior of gas bubble in non-Newtonian fluid: a numerical study

et al. 2013

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In the present paper, the nonlinear behavior of bubble growth under the excitation of an acoustic pressure pulse in non-Newtonian fluid domain has been investigated. Due to the importance of the bubble in the medical applications such as drug, protein or gene delivery, blood is assumed to be the reference fluid. Effects of viscoelasticity term, Deborah number, amplitude and frequency of the acoustic pulse are studied. We have studied the dynamic behavior of the radial response of bubble using Lyapunov exponent spectra, bifurcation diagrams, time series and phase diagram. A period-doubling bifurcation structure is predicted to occur for certain values of the effects of parameters. The results show that by increasing the elasticity of the fluid, the growth phenomenon will be unstable. On the other hand, when the frequency of the external pulse increases the bubble growth experiences more stable condition. It is shown that the results are in good agreement with the previous studies.

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Numerical simulation of blood pulsatile flow in a stenosed carotid artery using different rheological models

Cited by 206 publications

References 22 publications

Morphometric evaluation of the delayed cerebral arteries response to acetazolamide test in patients with chronic carotid artery stenosis using computed tomography angiography

Morphometric evaluation of the delayed cerebral arteries response to acetazolamide test in patients with chronic carotid artery stenosis using computed tomography angiography

Rheological Behavior of Physiological Pulsatile Flow through a Model Arterial Stenosis with Moving Wall

Chaotic behavior of gas bubble in non-Newtonian fluid: a numerical study

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