Numerical study of the pulsatile flow depending on non-Newtonian viscosity in a stenosed microchannel

Ha, Yi Kyung; Hong, Hyeonji; Yeom, Eunseop; Song, Jae Min

doi:10.1007/s12650-019-00601-5

Cited by 14 publications

(3 citation statements)

References 35 publications

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“…Blood flow ensures the transportation of nutrients, hormones, metabolic waste products, oxygen, and carbon dioxide throughout the body to maintain cell-level metabolism, the regulation of the pH, osmotic pressure, and temperature of the whole body, and the protection from microbial and mechanical harm. With the development of computational biomechanics, some researchers [1][2][3][4][5] have performed numerical simulations of blood flow. Blood has been considered a Newtonian fluid for decades, but recent experiments have shown that blood has pronounced viscoelastic behavior.…”

Section: Introductionmentioning

confidence: 99%

Computational fluid dynamics of coronary arteries with implanted stents: Effects of Newtonian and non‐Newtonian blood flows

Ahadi,

Biglari,

Azadi

et al. 2023

Engineering Reports

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This study introduces and compares computational fluid dynamics of Newtonian and non‐Newtonian blood flows in coronary arteries, with and without considering stents. Three blood flow models, including Newtonian, Carreau, and non‐Newtonian power‐law models, were simulated to investigate their effect, and the solution algorithm includes drawing the geometry, creating the desired mesh, and then simulating Newtonian and non‐Newtonian blood flow different models and comparing them with each other, is presented in the article. A Newtonian fluid model has been commonly used in the simulation of blood flow, whereas blood has non‐Newtonian properties due to the nature of a solution containing suspended particles. The goal of this research is to investigate the differences between the models built with Newtonian and non‐Newtonian fluid assumptions. In addition, a stent was designed and the effect of the stent on blood flow parameters was investigated for all three flow models, including Newtonian, Carreau, and non‐Newtonian power‐law models. Stents are medical devices that can be placed in arteries to open up blood flow in a blocked vessel. Stents can affect the wall shear stress. Knowing the slight deformation of the shear stress makes the importance of stent implantation and also helps to optimize the design of the intravascular stent, which can affect the occlusion of the vessels. The distribution of the velocity, pressure, and wall shear stress in all blood flow models with and without considering the effect of stents have been investigated and finally compared. Therefore, in general, the innovation of this article is to find the effect of implanted stents on blood flow parameters with different blood flow models, both Newtonian and non‐Newtonian. A comparison of Newtonian and non‐Newtonian flows showed that in the case of the Carreau non‐Newtonian model, the wall shear stress was higher. In addition, in the results of the geometric model with a stent effect compared to the geometric model without a stent effect, it is evident that there was a higher velocity and wall shear stress.

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Section: Introductionmentioning

confidence: 99%

Computational fluid dynamics of coronary arteries with implanted stents: Effects of Newtonian and non‐Newtonian blood flows

Ahadi,

Biglari,

Azadi

et al. 2023

Engineering Reports

View full text Add to dashboard Cite

show abstract

“…Blood contains various cells including red blood cells, white blood cells, and platelets in plasma. With the development of computational biomechanics, some researchers [1][2][3][4][5] have performed numerical simulations of blood flow, but in numerical simulations, whether blood can be considered a Newtonian fluid or not is still a matter of debate. In general, blood is considered a non-Newtonian fluid.…”

Section: Introductionmentioning

confidence: 99%

3D computational fluid dynamics of Newtonian and non-Newtonian blood flow in coronary arteries with implanted stents

Ahadi

Azadi

Biglari

et al. 2023

Preprint

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This study introduces and compares computational fluid dynamics of Newtonian and non-Newtonian blood flow in coronary arteries with and without considering stents for the first time. Three blood flow models, including Newtonian, Carreau, and non-Newtonian power-law models, have been simulated to investigate their effect, and the solution algorithm includes drawing the geometry, creating the desired mesh, and then simulating Newtonian and non-Newtonian blood flow different models and comparing them with each other, is presented in the article. A Newtonian fluid model is commonly used in the simulation of blood flow, whereas blood has non-Newtonian properties due to the nature of a solution containing suspended particles. Our goal in this research is to investigate the differences between the models built with Newtonian and non-Newtonian fluid assumptions. Moreover, a stent has been designed and its effect has been investigated in all blood flow models. Stents are medical devices that can be placed in arteries to open up blood flow in a blocked vessel. In this regard, a lot of computational modeling and simulation has been done as an important tool to predict the performance of stents. The distribution of velocity, pressure, and wall shear stress in all blood flow models with and without considering the effect of stents have been investigated and finally compared. A comparison of Newtonian and non-Newtonian flows showed that in the case of the Carreau non-Newtonian model, the wall shear stress is higher. In addition, in the results of the geometric model with a stent effect compared to the geometric model without a stent effect, it is evident that there is a higher velocity and wall shear stress.

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“…Faster processors and further sophisticated computational procedures have at this instant made it conceivable to use a better network and in further realistic conditions to carry out studies. References [24][25][26] show some relevant revisions on non-Newtonian blood flow. Power law fluid is the simplest non-Newtonian material.…”

Section: Introductionmentioning

confidence: 99%

Electro-Osmotic Blood Flow of Shear-Thinning Fluid with Hall Current and Wall Flexibility

Tanveer,

Hameed,

Hayat

et al. 2023

Sci. Eng. Technol.

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The presented article aims to present the flow of blood in microchannels such as veins and arteries via peristaltic flow. The magnetic field is imposed to regulate the flow as laminar. Also, its impacts in terms of Hall current have been considered. The rate of heat transfer is further based on Joule heating and viscous dissipation aspects. Mathematical analysis has been conducted given long wavelength and small Reynolds number. Such preferences are relatable to the medical domain where the magnetic field regulates the flow stream and aids in the melting of blood clots in patients with various heart diseases. The solution for electric potential is calculated analytically while the velocity, temperature, and heat transfer rate are executed directly via the built-in command of Mathematica software. Since the magnetic field acts as an opposing force. Results show that the velocity and temperature are decreasing functions of the magnetic field. However, the temperature is increasing for Weissenberg number.

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Numerical study of the pulsatile flow depending on non-Newtonian viscosity in a stenosed microchannel

Cited by 14 publications

References 35 publications

Computational fluid dynamics of coronary arteries with implanted stents: Effects of Newtonian and non‐Newtonian blood flows

Computational fluid dynamics of coronary arteries with implanted stents: Effects of Newtonian and non‐Newtonian blood flows

3D computational fluid dynamics of Newtonian and non-Newtonian blood flow in coronary arteries with implanted stents

Electro-Osmotic Blood Flow of Shear-Thinning Fluid with Hall Current and Wall Flexibility

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