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Magnetic source impact on nanofluid heat transfer using CVFEM

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Abstract

Influence of variable magnetic field on Fe3O4–H2O heat transfer in a cavity with circular hot cylinder is investigated. Innovative numerical method is chosen, namely CVFEM. The effects of radiation parameter, Rayleigh and Hartmann numbers on hydrothermal characteristics are presented. Results indicated that Lorentz forces cause the nanofluid motion to decrease and augment the thermal boundary layer thickness. Temperature gradient augments with augmentation of radiation parameter, Rayleigh number, but it reduces with augmentation of Lorentz forces.

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Abbreviations

B :

Magnetic induction

En:

Heat transfer enhancement

Ec :

Eckert number

H :

Magnetic field strength

\(\mathop g\limits^{ \to }\) :

Gravitational acceleration vector

Nu :

Nusselt number

Ha :

Hartmann number

T :

Fluid temperature

Ra :

Rayleigh number

V, U :

Vertical and horizontal dimensionless velocity

Y, X :

Vertical and horizontal space coordinates

β :

Thermal expansion coefficient

μ 0 :

Magnetic permeability of vacuum

α :

Thermal diffusivity

Ω and Ψ :

Dimensionless vorticity and stream function

Θ :

Dimensionless temperature

γ :

Magnetic field strength at the source

ρ :

Fluid density

μ :

Dynamic viscosity

σ :

Electrical conductivity

nf:

Nanofluid

f:

Base fluid

loc:

Local

c:

Cold

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Authors and Affiliations

  1. Department of Mechanical Engineering, Babol University of Technology, Babol, Iran

    M. Sheikholeslami

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Correspondence to M. Sheikholeslami.

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Sheikholeslami, M. Magnetic source impact on nanofluid heat transfer using CVFEM. Neural Comput & Applic 30, 1055–1064 (2018). https://doi.org/10.1007/s00521-016-2740-7

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  • DOI: https://doi.org/10.1007/s00521-016-2740-7

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