Numerical study of nonlinear pulsatile flow in S-shaped curved arteries

Qiao, Aike; Guo, Xiaojie; Wu, Shengping; Zeng, Yan; Xu, XY

doi:10.1016/j.medengphy.2004.04.008

Cited by 44 publications

(30 citation statements)

References 13 publications

(12 reference statements)

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“…By comparing our results with the previous study, it can be seen that velocity increases as the time is increased. However, the maximum velocity determined by Qiao et al (2004) is higher than that obtained in the current simulation. This is because in parts of the simulation setup there is no guarantee of 100% error-free implementation.…”

Section: E Pre-setup In Fsi Fluidcontrasting

confidence: 85%

“…Figure 4 shows the comparison of the velocity between the geometrical S-shaped artery in this study's simulation and that of the model of Qiao, Guo, Wu, Zeng, and Xu (2004). Qiao et al (2004) showed that the velocity increases linearly with time. By comparing our results with the previous study, it can be seen that velocity increases as the time is increased.…”

Section: E Pre-setup In Fsi Fluidmentioning

confidence: 70%

“…In addition, the difference may be because of the different software used for the simulation. The error between this validation study and the results of Qiao et al (2004) is 57%. The pressures applied to both simulation studies are within the range of normal blood pressure, which is 120 mmHg.…”

Section: E Pre-setup In Fsi Fluidmentioning

confidence: 77%

See 2 more Smart Citations

Prediction of Blood Pattern in S-Shaped Model of Artery under Normal Blood Pressure

Hisham

Norashikin²,

Hazreen³

et al. 2013

J MECH ENG SCI

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Athletes are susceptible to a wide variety of traumatic and non-traumatic vascular injuries to the lower limb. This paper aims to predict the three-dimensional flow pattern of blood through an S-shaped geometrical artery model. This model has created by using Fluid Structure Interaction (FSI) software. The modeling of the geometrical Sshaped artery is suitable for understanding the pattern of blood flow under constant normal blood pressure. In this study, a numerical method is used that works on the assumption that the blood is incompressible and Newtonian; thus, a laminar type of flow can be considered. The authors have compared the results with a previous study with FSI validation simulation. The validation and verification of the simulation studies is performed by comparing the maximum velocity at t = 0.4 s, because at this time, the blood accelerates rapidly. In addition, the resulting blood flow at various times, under the same boundary conditions in the S-shaped geometrical artery model, is presented. The graph shows that velocity increases linearly with time. Thus, it can be concluded that the flow of blood increases with respect to the pressure inside the body.

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Section: E Pre-setup In Fsi Fluidcontrasting

confidence: 85%

Section: E Pre-setup In Fsi Fluidmentioning

confidence: 70%

See 1 more Smart Citation

Prediction of Blood Pattern in S-Shaped Model of Artery under Normal Blood Pressure

Hisham

Norashikin²,

Hazreen³

et al. 2013

J MECH ENG SCI

View full text Add to dashboard Cite

show abstract

“…4). Computational simulations have confirmed this [128,129,130,131]. Tortuous veins may also lead to thrombosis due to changes in the blood flow and shear stress [111,132,133].…”

Section: Mechanical Changes In Tortuous Arteriesmentioning

confidence: 89%

Twisted Blood Vessels: Symptoms, Etiology and Biomechanical Mechanisms

Han¹

2012

J Vasc Res

385

355

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Tortuous arteries and veins are commonly observed in humans and animals. While mild tortuosity is asymptomatic, severe tortuosity can lead to ischemic attack in distal organs. Clinical observations have linked tortuous arteries and veins with aging, atherosclerosis, hypertension, genetic defects and diabetes mellitus. However, the mechanisms of their formation and development are poorly understood. This review summarizes the current clinical and biomechanical studies on the initiation, development and treatment of tortuous blood vessels. We submit a new hypothesis that mechanical instability and remodeling could be mechanisms for the initiation and development of these tortuous vessels.

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“…The lumen flow generates shear forces that depend on the deformation and affects the equilibrium and thus the critical buckling pressure and buckling deformation. These interactions were ignored in many previous analyses of flow in curved vessels, and computational fluid dynamics were used to determine the flow field and wall shear stress [18][19][20]. To better understand the buckling behavior of arteries and its effect on the blood flow in the vessel lumen, it is necessary to analyze the artery buckling using the FSI modeling.…”

Section: Introductionmentioning

confidence: 99%

Stability of Carotid Artery Under Steady-State and Pulsatile Blood Flow: A Fluid–Structure Interaction Study

Khalafvand

Han

2015

Journal of Biomechanical Engineering

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It has been shown that arteries may buckle into tortuous shapes under lumen pressure, which in turn could alter blood flow. However, the mechanisms of artery instability under pulsatile flow have not been fully understood. The objective of this study was to simulate the buckling and post-buckling behaviors of the carotid artery under pulsatile flow using a fully coupled fluid-structure interaction (FSI) method. The artery wall was modeled as a nonlinear material with a two-fiber strain-energy function. FSI simulations were performed under steady-state flow and pulsatile flow conditions with a prescribed flow velocity profile at the inlet and different pressures at the outlet to determine the critical buckling pressure. Simulations were performed for normal (160 ml/min) and high (350 ml/min) flow rates and normal (1.5) and reduced (1.3) axial stretch ratios to determine the effects of flow rate and axial tension on stability. The results showed that an artery buckled when the lumen pressure exceeded a critical value. The critical mean buckling pressure at pulsatile flow was 17-23% smaller than at steady-state flow. For both steady-state and pulsatile flow, the high flow rate had very little effect (<5%) on the critical buckling pressure. The fluid and wall stresses were drastically altered at the location with maximum deflection. The maximum lumen shear stress occurred at the inner side of the bend and maximum tensile wall stresses occurred at the outer side. These findings improve our understanding of artery instability in vivo.

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Numerical study of nonlinear pulsatile flow in S-shaped curved arteries

Cited by 44 publications

References 13 publications

Prediction of Blood Pattern in S-Shaped Model of Artery under Normal Blood Pressure

Prediction of Blood Pattern in S-Shaped Model of Artery under Normal Blood Pressure

Twisted Blood Vessels: Symptoms, Etiology and Biomechanical Mechanisms

Stability of Carotid Artery Under Steady-State and Pulsatile Blood Flow: A Fluid–Structure Interaction Study

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