Numerical simulations of blood flow in arterial bifurcation models

Seo, Taewon

doi:10.1007/s13367-013-0016-7

Cited by 17 publications

(9 citation statements)

References 20 publications

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“…The results of the program were for three cardiac cycles to ensure reproducibility of the pulsed characteristic flow. shown in figures (4)- (8) . The largest gradient of velocity occurs at the two pulse velocities ( 0.35 , 0.5) .…”

Section: Resultsmentioning

confidence: 99%

“…In a sharpened artery with stenosis showed increases WSS near the stenosis and appeared flow separation after throat of stenosis .also indicated that the higher value of WSS causes harm to the endothelium layer ,This is because they showed 50% diameter reduction causes damage to the endothelium layer. Seo (2013) [8] Used two different carotid artery model geometries (First geometry model was typical carotid and second model was internal and external carotid artery branches of the bifurcation joined in parallel to each other ) in the numerical simulations of blood flow through them . The governing equations solved using FLUENT .…”

Section: Jung Et Al (2004)[6]mentioning

confidence: 99%

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Computational fluid dynamic analysis of blood flow through critical stenosis of the right coronary artery in human

J.Muhseen¹,

Hannun²

2020

UTJES

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The aim of this paper is to predict the hemodynamics properties of blood flow during in the Critical stenosis RCA . This paper examines pulsed , laminar blood flow through state of the right coronary artery in patient heart. Data for these case were taken from a catheter laboratory in the Thi Qar Heart Center . The case for a man born in 1957 who has one stenosis in RCA with a stenosis of 80%. A non-Newtonian blood model characterized by the Carreau equation was used, and a 3D model was used with the governing equations analyzed using the specified volumetric method. The SIMPLE algorithm has been adopted to link pressure and speed during runoff. Geometric figures are drawn using Auto CAD software and combined with FLUENT. The results showed that the speed increased significantly in the area of stenosis. Non-Newtonian viscosity increases its effect near the center of stenosis. The total pressure is equal to diastolic pressure with little increase

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Section: Resultsmentioning

confidence: 99%

Section: Jung Et Al (2004)[6]mentioning

confidence: 99%

Computational fluid dynamic analysis of blood flow through critical stenosis of the right coronary artery in human

J.Muhseen¹,

Hannun²

2020

UTJES

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“…To investigate the effect of Newtonian and non-Newtonian blood behavior on the flow characteristics, maximum shear stress values were compared in the Newtonian and non-Newtonian cases. The Carreau model suggested by Seo (Seo 2013) was used for the non-Newtonian blood. In this model, the relationship between shear rate and viscosity is as follows:…”

Section: Effects Of Location Of the Stenosismentioning

confidence: 99%

Study of Pulsatile Flow in Common Carotid Artery with Different Stenosis' Shapes within Various Wall Conditions

Bayat

Tavakoli

2019

JAFM

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Recently, due to the development of CFD techniques, many attempts have been made to simulate the initiation and progression of atherosclerosis. In recent works, various curves have been suggested to model the stenosis shape. However, little effort has been made to study the importance of the stenosis shape on the flow behavior. In this study, four types of stenosis with asteroid, Gaussian, semicircle , and sinusoidal shapes were simulated in order to study the effect of the stenosis shape on flow behavior and diagnosis parameters. Shear stress and flow behavior were investigated in the common carotid artery with stenosis severities of 30%, 40%, and 50%. Flow was assumed to be unsteady and the inlet to be a pulsatile flow. Two cases of Newtonian and non-Newtonian fluids were simulated. The no-slip and permeable boundary conditions were imposed on the outer walls. To examine the effect of the location of stenosis, modeling was conducted at various locations. The results showed that the maximum shear stress occurs in the Gaussian stenosis at the opening of the stenosis. Semicircle , sinus, and asteroid shapes had the next largest shear stress values. Additionally, the location of stenosis had a negligible effect on the maximum shear stress. However, flow resistance increased with increasing the stenosis's distance from the beginning of the artery. This study indicates that stenosis shape highly affects the flow characteristics, and stenosis severity is not the only parameter that is important. Hence, the stenosis shape should be considered when simulating atherosclerosis.

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“…There are a number of studies reported in the literature on three dimensional numerical simulations of blood flow [8][9][10][11][12][13]. However, nearly all of these simulations contain only a single level of bifurcation in the modeled vascular system.…”

Section: Contents Lists Available At Sciencedirectmentioning

confidence: 99%

“…Calculations made with Eqs. (7) and (8) indicate that the contraction ratio, γ, ranges from 0.3 to 0.8 as the peripheral resistance, R, varies from 5.2 to 474.2 mmHg-s/ml.…”

Section: Boundary Conditions For the Blood Flow Modelmentioning

confidence: 99%

A numerical model of pulsatile blood flow in compliant arteries of a truncated vascular system

Kahveci

Becker

2015

International Communications in Heat and Mass Transfer

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Numerical simulations of blood flow in arterial bifurcation models

Cited by 17 publications

References 20 publications

Computational fluid dynamic analysis of blood flow through critical stenosis of the right coronary artery in human

Computational fluid dynamic analysis of blood flow through critical stenosis of the right coronary artery in human

Study of Pulsatile Flow in Common Carotid Artery with Different Stenosis' Shapes within Various Wall Conditions

A numerical model of pulsatile blood flow in compliant arteries of a truncated vascular system

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