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A comprehensive study of thermal conductivity models with metallic and non-metallic nanoparticles in the blood flow through a regular catheter in multi-stenosed artery

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Abstract

A theoretical study of three metallic nanoparticles like gold, copper and silver and non-metallic nanoparticles like aluminium oxide and titanium oxide in a multi-stenosed artery with a regular catheter is studied. Blood in the artery is considered Newtonian fluid due to the presence of plasma. By the assumptions of mild stenosis, the governing equations of nanoparticles are simplified, and using Cauchy–Euler method, the solutions are found. We focus on the study of various thermal conductivity models in nanofluids. The effects of thermal conductivity on these nanoparticles are studied and graphically plotted. The study reveals that the non-metallic nanoparticles enhance the flow of blood in the arteries and regulate the flow in axial velocity. Multiple stenosis in the artery with parameters such as shape parameter, stenosis height, and catheter radius has significant effects on velocity, temperature, wall shear stress, and resistance impedance. The effect of the Grashof number on different physical parameters is also discussed. Models depending on the thermal conductivity factors rather than nanofluid volume fraction are highly reliable.

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Abbreviations

Gr:

Grashof number

K :

Thermal conductivity

F :

Flow rate (\(\hbox {m}^{3}\,\hbox {s}^{-1}\))

L :

Radius of artery with stenosis

\(L_{0}\) :

Radius of artery without stenosis

H :

Height of the artery

\(S_{rz}\) :

Wall shear stress (\({\hbox {N m}}^{-2}\))

c :

Radius of catheter

d :

Stenosis height

h :

Dimensional stenosis position

i :

Dimensionless stenosis position

\(q_{0}\) :

Heat source

r :

Radial axis

t :

Temperature of the fluid (K)

\(t_{0}\) :

Temperature in the inner wall of the artery (K)

\(t_{1}\) :

Temperature in the outer wall of the artery (K)

u :

Average velocity (\({\hbox {m s}}^{-1}\))

w :

Velocity taken over axial z (\(\hbox {m s}^{-1}\))

n :

Shape parameter

z :

Axial axis

\(c_{{\mathrm{p}}}\) :

Specific heat capacitance (\({\hbox {J kg}}^{-1}\,{\hbox {K}}\))

\(\rho \) :

Density (\({\hbox {kg m}}^{-3}\))

\(\gamma \) :

Thermal expansion coefficient

\(\mu \) :

Viscosity (\(\hbox {N s m}^{-2}\))

\(\psi \) :

Shape parameter

\(\theta \) :

Dimensionless temperature

\(\Delta p\) :

Pressure gradient

\(\lambda \) :

Resistance impedance

\(\beta \) :

Heat source

\(\varPhi \) :

Nanofluid volume fraction

bf:

Basefluid

nf:

Nanofluid

np:

Nanoparticles

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Acknowledgements

The author would like to thank the Deanship of Scientific Research at Majmaah University for supporting this work under Project No. R-2022-261.

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Correspondence to Ziyad A. Alhussain.

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Alhussain, Z.A. A comprehensive study of thermal conductivity models with metallic and non-metallic nanoparticles in the blood flow through a regular catheter in multi-stenosed artery. Appl Nanosci 12, 4033–4045 (2022). https://doi.org/10.1007/s13204-022-02622-3

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  • DOI: https://doi.org/10.1007/s13204-022-02622-3

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