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Neural Computing and Applications

, Volume 30, Issue 4, pp 1055–1064 | Cite as

Magnetic source impact on nanofluid heat transfer using CVFEM

  • M. SheikholeslamiEmail author
Original Article

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.

Keywords

Nanofluid CVFEM Free convection Magnetic field Circular wall 

List of symbols

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

Greek symbols

β

Thermal expansion coefficient

μ0

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

Subscripts

nf

Nanofluid

f

Base fluid

loc

Local

c

Cold

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Copyright information

© The Natural Computing Applications Forum 2016

Authors and Affiliations

  1. 1.Department of Mechanical EngineeringBabol University of TechnologyBabolIran

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