The thermal behavior of blood flow in the arteries with various radii and various stenosis angles using non-Newtonian Sisko model

Alexandria Engineering Journal

Yongfeng Zheng¹  Zarringhalam Majid¹  Tingting Deng²  Xingting Liu²  Xingcan Jia²  Toghraie Davood²  Xingyu Chen²  Yunwu Zhang³  Jie Xie⁴ 

[1] Corresponding authors.;Chengdu University of Traditional Chinese Medicine, Chengdu, Sichuan 611100, China;Department of Biochemistry and Molecular Biology, West China School of Basic Medical Sciences and Forensic Medicine, Sichuan University, Chengdu, Sichuan 610000, China;Sichuan Cancer Hospital, Chengdu, Sichuan 611100, China;

关键词: Narrowed arteries;    Sisko fluid;    Heat flux;    Nusselt number;   

DOI  :  

来源: DOAJ

【 摘 要 】

In this work, the FVM method is employed to simulate blood flow behavior within stenosis arteries based on the non-Newtonian Sisko model by using UDF in Fluent. Stenosis is simulated in cone geometry, and influences of different angles of stenosis with different artery radii are studied on the Nusselt number and temperature of blood flow. It is observed that with increasing angles of stenosis and reducing internal radius, the artery is narrowed, which results in enhancement of Nusselt number of blood flow. Thus, the temperature of blood flow is reduced. Also, applying heat fluxes of q“ = 400 W/m2, q” = 800 W/m2, and q“ = 1000 W/m2 prepare temperature enhancement as much as 0.44 K, 0.89 K, and 1.15 K respectively which are important from a medical viewpoint. The maximum temperature is reported as much as 38.2  °C by applying heat flux of q” = 1000 W/m2, which is noticeable for the human body healthy, especially for the function of enzymes and other proteins of the body. Also, with increasing angles of stenosis and reducing internal radius, the artery is tightened and velocity of blood fluid is enhanced which affects blood circulation between tissues and the oxygenation process, temperature variation, and heat transfer alteration of blood flow within the human body. In reality, circulation of blood transfers heat between tissues, and the dimensions of the blood vessels are various, whenever more blood is needed in some vessels of the body due to more activity, these blood vessels expand to supply the required blood while other vessels tight to compensate it. Therefore, present mechanical research is applicable for medical science especially in surgical widening of a blocked or narrowed blood vessel.

【 授权许可】

Unknown