Effect of six non-Newtonian viscosity models on hemodynamic parameters of pulsatile blood flow in stenosed artery

Jahangiri, Mehdi; Saghafian, Mohsen; Sadeghi, Mahmood Reza

doi:10.22061/jcarme.2017.1433.1114

Document Type : Research Paper

Authors

¹ Department of Mechanical Engineering, Faculty of Technical Engineering, Shahrekord Branch, Islamic Azad University, Shahrekord 88137-33395, Iran

² Department of Mechanical Engineering, Isfahan University of Technology, Isfahan, 8415683111, Iran

³ Department of Biomedical Engineering, University of Isfahan, Isfahan, 8174673441, Iran

https://doi.org/10.22061/jcarme.2017.1433.1114

Abstract

A numerical study of hemodynamic parameters of pulsatile blood flow is presented in a stenotic artery with
A numerical study of hemodynamic parameters of pulsatile blood flow is presented in a stenotic artery with non-Newtonian models using ADINA. Blood flow was considered laminar, and the arterial wall was considered rigid. Studied stenosis severities were 30, 50, and 70% of the cross-sectional area of the artery. Six non-Newtonian models were used to model the non-Newtonian behavior of blood, and their results were compared with the Newtonian model. The results showed that in Power-law and Walburn-Schneck models, unlike other models, shear stress values before and after the stenosis were smaller than Newtonian models. Also, in maximum flow rate, the Carreua, generalized Power-law, Casson, and Carreua-Yasuda models showed a reduction in global importance factor of non-Newtonian behavior, and subsequently, the results approached Newtonian model. In minimum flow rate, the global importance factor of Newtonian behavior increased, which highlighted the importance of Newtonian model. In minimum flow rate, Carreua-Yasuda model was more sensitive to the non-Newtonian behavior of blood compared to Carreua, Casson, and Power-law models. Also, in that time period, Walburn-Schneck was less sensitive to the non-Newtonian behavior of blood. On the other hand, this model did not show sensitivity when the flow rate was at its peak. Power-law model overestimated the global importance factor values. Therefore, Power-law model was not suitable, because it showed extreme sensitivity to dimension. Walburn-Schneck model was not suitable too because it lacked sensitivity.

Graphical Abstract

Keywords

20.1001.1.22287922.2018.7.2.6.6

Main Subjects

Biomechanics

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Journal of Computational & Applied Research in Mechanical Engineering (JCARME)

Effect of six non-Newtonian viscosity models on hemodynamic parameters of pulsatile blood flow in stenosed artery

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Volume 7, Issue 2 - Serial Number 14
March 2018
Pages 199-207

Effect of six non-Newtonian viscosity models on hemodynamic parameters of pulsatile blood flow in stenosed artery

References

References

Send comment about this article

Volume 7, Issue 2 - Serial Number 14March 2018Pages 199-207

Volume 7, Issue 2 - Serial Number 14
March 2018
Pages 199-207