MHD natural convection and entropy generation of non-Newtonian ferrofluid in a wavy enclosure

Afsana, Sadia; Molla, Md. Mamun; Nag, Preetom; Saha, Litan Kumar; Siddiqa, Sadia

doi:10.1016/j.ijmecsci.2021.106350

Cited by 71 publications

(23 citation statements)

References 65 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The simulation procedure maintains iterations until the residual tolerance is less than or equal to

1 0^{- 9}

for all the variables (i.e.,

u, v, θ

). This code is used for several studies on the non‐Newtonian fluids with irregular‐shaped geometric models 3,54‐58 . A detailed description of the numerical method in curvilinear coordinates with a discretization scheme as well as the description of the code could be found in Refs.…”

Section: Numerical Methodologymentioning

confidence: 99%

Study of mixed convection flow of power‐law fluids in a skewed lid‐driven cavity

et al. 2021

Self Cite

View full text Add to dashboard Cite

This study conducts a numerical simulation of mixed (combined) convective non‐Newtonian fluid flow inside a two‐dimensional cavity (skewed) having a moving lid. The upper and bottom extremities of the cavity with different temperatures and two insulated side walls cause natural convection. Moreover, the forced convection is maintained by the motion of the lid with constant velocity. The governing equations are nondimensionalized with appropriate transformations and then transformed into curvilinear coordinates. A finite volume numerical procedure with a collocated grid arrangement is used to solve these equations. Comparisons with previously reported results are carried out, which shows an excellent agreement. Non‐Newtonian behaviors such as pseudo‐plastic (shear‐thinning) and dilatant (shear‐thickening) are considered using the power‐law model, and thus the power‐law index is chosen accordingly. A wide range of the governing dimensionless parameters which affect the mixed convection flow inside the skewed cavity, including Grashof number ( 1 0 2 ≤ G r ≤ 5 × 1 0 4 ), Richardson number ( 0.000625 ≤ R i ≤ 5 ), Reynolds number ( R e = 100 and 400), and power‐law index ( 0.7 ≤ n ≤ 1.3 ). The Prandtl number ( P r = 10) is fixed and the skew angles ( φ = 4 5 ∘ , 9 0 ∘ , and 13 5 ∘ ) are considered for acute, right‐angle, and obtuse angles. The obtained numerical outcomes of the study are shown graphically and also in tabular form for vertical and horizontal velocities, streamlines, isotherms, temperature distributions, and the rate of heat transfer and insight physics of the flow features, are discussed thereafter. It can be concluded that the rate of heat transfer in the present case is sensitive to the skew‐angle as well as power‐law index, and the maximum heat transfer occurs in the case of dilatant (shear‐thickening) fluid.

show abstract

“…The simulation procedure maintains iterations until the residual tolerance is less than or equal to

1 0^{- 9}

for all the variables (i.e.,

u, v, θ

Section: Numerical Methodologymentioning

confidence: 99%

Study of mixed convection flow of power‐law fluids in a skewed lid‐driven cavity

et al. 2021

Self Cite

View full text Add to dashboard Cite

show abstract

“…The author found that the power-law effect on the heat transfer enhancement becomes countable at a high Ra number. Afsana et al 96 investigated free convection of non-Newtonian fluid in a square cavity with wavy sidewalls under the MHD effect. They found that the effect of the Ha number on the entropy generation is much higher in shear-thinning than in shear thickening.…”

Section: Natural Convection Of Non-newtonian Nanofluids In a Porous Media Under The Mhd Effectmentioning

confidence: 99%

Newtonian and non‐Newtonian nanofluids with entropy generation in conjugate natural convection of hybrid nanofluid‐porous enclosures: A review

et al. 2021

View full text Add to dashboard Cite

show abstract

“… 30 , an enclosure with wavy side walls filled with a ferrofluid Afsana et al . 31 . Bahiraei 32 studied the heat transportation performance of a hybrid eco-friendly nanoliquid flowing inside tubes equipped with rotary twisted tape.…”

Section: Introductionmentioning

confidence: 99%

MHD darcy-forchheimer nanofluid flow and entropy optimization in an odd-shaped enclosure filled with a (MWCNT-Fe3O4/water) using galerkin finite element analysis

Al‐Kouz

Abderrahmane

Koulali

et al. 2021

Sci Rep

View full text Add to dashboard Cite

MHD nanoliquid convective flow in an odd-shaped cavity filled with a multi-walled carbon nanotube-iron (II, III) oxide (MWCNT-Fe3O4) hybrid nanofluid is reported. The side walls are adiabatic, and the internal and external borders of the cavity are isothermally kept at high and low temperatures of Th and Tc, respectively. The governing equations obtained with the Boussinesq approximation are solved using Galerkin Finite Element Method (GFEM). Impact of Darcy number (Da), Hartmann number (Ha), Rayleigh number (Ra), solid volume fraction (ϕ), and Heated-wall length effect are presented. Outputs are illustrated in forms of streamlines, isotherms, and Nusselt number. The impact of multiple parameters namely Rayleigh number, Darcy number, on entropy generation rate was analyzed and discussed in post-processing under laminar and turbulent flow regimes.

show abstract

MHD natural convection and entropy generation of non-Newtonian ferrofluid in a wavy enclosure

Cited by 71 publications

References 65 publications

Study of mixed convection flow of power‐law fluids in a skewed lid‐driven cavity

Study of mixed convection flow of power‐law fluids in a skewed lid‐driven cavity

Newtonian and non‐Newtonian nanofluids with entropy generation in conjugate natural convection of hybrid nanofluid‐porous enclosures: A review

MHD darcy-forchheimer nanofluid flow and entropy optimization in an odd-shaped enclosure filled with a (MWCNT-Fe3O4/water) using galerkin finite element analysis

Contact Info

Product

Resources

About