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Simultaneous Impacts of Fe3O4 Particles and Thermal Radiation on Natural Convection of Non-Newtonian Flow Between Two Vertical Flat Plates Using ADM

  • Ameur Gabli , Mohamed Kezzar EMAIL logo , Lilia Zighed , Mohamed Rafik Sari and Ismail Tabet

Abstract

The main aim of this research work is to show the simultaneous effects of ferro-particles (Fe3O4) and thermal radiation on the natural convection of non-Newtonian nanofluid flow between two vertical flat plates. The studied nanofluid is created by dispersing ferro-particles (Fe3O4) in sodium alginate (SA), which is considered as a non-Newtonian base fluid. Resolution of the resulting set of coupled non-linear second order differential equations characterizing dynamic and thermal distributions (velocity/temperature) is ensured via the Adomian decomposition method (ADM). Thereafter the obtained ADM results are compared to the Runge–Kutta–Feldberg based shooting data. In this investigation, a parametric study was conducted showing the influence of varying physical parameters, such as volumic fraction of Fe3O4 nanoparticles, Eckert number (Ec) and thermal radiation parameter (N), on the velocity distribution, the skin friction coefficient, the heat transfer rate and the temperature distribution. Results obtained also show the advantages of ferro-particles over other types of standard nanoparticles. On the other hand, this investigation demonstrates the accuracy of the adopted analytical ADM technique.

Appendix A

In this appendix, we present the first terms of solution for velocity and temperature fields.

(A.1)Velocity:V1=c2η2d6η3V2=0.041A3(1φ)2.5b2EcPrη4+0.083A3(1φ)2.5b4EcPrδη4(1.φ)2.5+3.(1φ)2.5b2cδη2(1.φ)5.+1.(1φ)2.5b2dδη3(1.φ)5.V3=1(1ψ)2.5[0.016A3bcEcPrη50.0027A3bdEcPrη60.25A3b4EcPrδη4(1.1.ψ)2.5+0.001A3c4EcPrδη8(1.1.ψ)2.5+V=c2η2d6η3+0.041A3(1φ)2.5b2EcPrη4+0.083A3(1φ)2.5b4EcPrδη4(1.φ)2.5+
(A.2)Temperature:θ1=12A3b2EcPrη2(2b2δ1(1φ)2.5)θ2=0.33A3(1φ)2.5bcEcPrη3+0.083A3(1φ)2.5bdEcPrη4+0.66A3(1φ)2.5cNη2(1.φ)2.5+0.22A3dNη30.066A3(1φ)2.5c4EcPrδη6(1.φ)2.50.095A3(1φ)2.5c3dEcPrδη7(1.φ)2.50.053A3(1φ)2.5c2d2EcPrδη8(1.φ)2.50.0138A3(1φ)2.5cd3EcPrδη9(1.φ)2.50.00138A3d4EcPrδη10θ3=1(1ψ)17.5[0.000008A35b8Ec5Pr5δη14(1.1.ψ)7.50.00006A35b10Ec5Pr5δ2η14(1.1.ψ)10.0.016A32b3Ec2Pr2η5(1.1.ψ)12.5θ=12A3b2EcPrη2(2b2δ1(1φ)2.5)+0.33A3(1φ)2.5bcEcPrη3+0.083A3(1φ)2.5bdEcPrη4+

Nomenclature

a, b, c and d

Constants

2b

Distance between the plates [m]

A1,,A4

Constants

F

Dimensionless velocity

θ

Dimensionless temperature

qw

Heat flux

qr

Radiative heat flux [Wm2]

Pr

Prandtl number

Ec

Eckert number

l

Distance [m]

x,y

Coordinates [m]

u,v

Velocity components [ms1]

T

Temperature [K]

T1 and T2

Temperatures [K]

η

Similarity variable

ρf

Fluid density [kgm3]

ρs

Nanoparticle density [kgm3]

ρnf

Nanofluid density [kgm3]

μnf

Dynamic viscosity of nanofluid [m2s1]

k

Stefan Boltzmann constant

kf

Thermal conductivity of base fluid [Wm1K1]

ks

Thermal conductivity of nanoparticles [Wm1K1]

knf

Thermal conductivity of nanofluid [Wm1K1]

cf

Heat capacity of base fluid [Jkg1K1]

cs

Heat capacity of nanoparticles [Jkg1K1]

cnf

Heat capacity of nanofluid [Jkg1K1]

σ

Absorption coefficient [WmK4]

δ

Dimensionless non-Newtonian viscosity

N

Thermal radiation

Subscripts

nf

Nanofluid

f

Base fluid

s

Solid nanoparticles

Abbreviations

ADM

Adomian decomposition method

HAM

Homotopy analysis method

HPM

Homotopy perturbation method

DTM

Differential transform method

SA

Sodium Alginate

Correction added after online publication on 19 February 2020: Mistakenly this article was already published ahead of print with typo-mistakes in formulae (1), (2), (5) and (9). The corrected typo-mistakes do not affect simulations and results. In nomenclature the correct units of some symbols are:

  1.  Radiative heat flux [Wm2]

  2.  Dynamic viscosity of nanofluid [Pa s]

  3.  Stefan Boltzmann constant [Wm2K4]

  4.  Absorption coefficient [m1]

We thank professor Mohamed Rafik Sari for his help in finding these typo-mistakes.

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Received: 2019-10-18
Revised: 2020-01-26
Accepted: 2020-01-31
Published Online: 2020-03-24
Published in Print: 2020-04-26

© 2020 Walter de Gruyter GmbH, Berlin/Boston

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