Free convection of a hybrid nanofluid past a vertical plate embedded in a porous medium with anisotropic permeability

Bibi, Aneela; Xu, Hang; Sun, Qiang; Pop, Ioan; Zhao, Qingkai

doi:10.1108/hff-10-2019-0799

Cited by 18 publications

(14 citation statements)

References 37 publications

(63 reference statements)

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“…For practical applications of oxide particles of nanofluids higher than 40 nm, the model proposed by Maïga et al, 62 is considered a better priority. In this model, the effective properties of a nanofluid 63 can be estimated from the following set of equations 23 :

ρ_{hnf} = (1 - φ) ρ_{bf} + φ ρ_{p},

{MathClass-open(ρ C p MathClass-close)}_{hnf} = (1 - φ) {MathClass-open(ρ C_{p} MathClass-close)}_{f} + φ {MathClass-open(ρ C_{p} MathClass-close)}_{n p},

{MathClass-open(ρ β MathClass-close)}_{hnf} = (1 - φ) {MathClass-open(ρ β MathClass-close)}_{f} + φ {MathClass-open(ρ C_{p} MathClass-close)}_{n p},

α_{hnf} = \frac{k_{hnf}}{{(ρ C p)}_{hnf}},

k_{hnf} = \frac{k_{np} + (m - 1) k_{f} - (m - 1) (k_{normalf} - k_{np}) φ}{k_{np} + (m - 1) k_{f} + (k_{normalf} - k_{np}) φ} k_{f...}

…”

Section: Thermophysical Properties Of the Nanofluidsmentioning

confidence: 99%

Numerical investigation of the thermo‐hydraulic performance of water‐based nanofluids in a dimpled channel flow using Al₂O₃, CuO, and hybrid Al₂O₃–CuO as nanoparticles

Ahmed¹,

Abir

Fuad³

et al. 2021

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In this study, the authors study the impact of spherical dimple surfaces and nanofluid coolants on heat transfer and pressure drop. The main objective of this paper is to evaluate the thermal performance of nanofluids with respect to different Reynolds numbers (Re) and nanoparticle compositions in dimpled channel flow. Water‐based nanofluids with Al 2 O 3, CuO, and Al 2 O 3–CuO nanoparticles are considered for this investigation with 1%, 2%, and 4% volume fraction for each nanofluid. The simulations are conducted at low Reynolds numbers varying from 500 to 1250, assuming constant and uniform heat flux. The effective properties of nanofluids are estimated using models proposed in the literature and are combined with the computational fluid dynamics solver ANSYS Fluent for the analysis. The results are discussed in terms of heat transfer coefficient, temperature distributions, pressure drop, Nusselt number, friction factors, and performance criterion for all the cases. For all cases of different nanoparticle compositions, the heat transfer coefficient was seen as 35%–46% higher for the dimpled channel in comparison with the smooth channel. Besides, it was observed that with increasing volume fraction, the values of heat transfer and pressure drop were increased. With a maximum of 25.18% increase in the thermal performance, the 1% Al 2 O 3/water was found to be the best performing nanofluid at Re = 500 in the dimpled channel flow.

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ρ_{hnf} = (1 - φ) ρ_{bf} + φ ρ_{p},

{MathClass-open(ρ C p MathClass-close)}_{hnf} = (1 - φ) {MathClass-open(ρ C_{p} MathClass-close)}_{f} + φ {MathClass-open(ρ C_{p} MathClass-close)}_{n p},

{MathClass-open(ρ β MathClass-close)}_{hnf} = (1 - φ) {MathClass-open(ρ β MathClass-close)}_{f} + φ {MathClass-open(ρ C_{p} MathClass-close)}_{n p},

α_{hnf} = \frac{k_{hnf}}{{(ρ C p)}_{hnf}},

k_{hnf} = \frac{k_{np} + (m - 1) k_{f} - (m - 1) (k_{normalf} - k_{np}) φ}{k_{np} + (m - 1) k_{f} + (k_{normalf} - k_{np}) φ} k_{f...}

…”

Section: Thermophysical Properties Of the Nanofluidsmentioning

confidence: 99%

Numerical investigation of the thermo‐hydraulic performance of water‐based nanofluids in a dimpled channel flow using Al₂O₃, CuO, and hybrid Al₂O₃–CuO as nanoparticles

Ahmed¹,

Abir

Fuad³

et al. 2021

Heat Trans

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“…In the present paper, Al 2 O 3 -Cu/water nanofluid is adopted as the hybrid nanofluid, which was experimentally used in (Suresh, 2012). Very important information on nanofluids and hybrid nanofluids can be also found in the published papers by Cimpean and Pop (2019), Bibi et al (2019), Khan et al (2019) and Waini et al (2020d).…”

Section: Introductionmentioning

confidence: 91%

Axisymmetric flow of hybrid nanofluid due to a permeable non-linearly stretching/shrinking sheet with radiation effect

Roşca

Pop³

2020

HFF

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Purpose This paper aims to report theoretical and numerical results for the problem of laminar axisymmetric flow of hybrid nanofluid over a permeable non-linearly stretching/shrinking sheet with radiation effect. Design/methodology/approach The numerical solutions of the arising boundary value problem are obtained using the function bvp4c from MATLAB for different values of the governing parameters. Findings It is found that the solutions of the ordinary (similarity) differential equations have two branches, upper and lower branch solutions, in a certain range of the stretching/shrinking and suction parameters. To establish which of these solutions are stable and which are not, a stability analysis has been performed. Originality/value To the best of the authors’ knowledge, present results are original and new for the study of fluid flow and heat transfer over a stretching/shrinking surface, as they successfully extend the problem considered by Mustafa et al. (2015) to the case of hybrid nanofluids.

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“…Waini et al 14 have investigated the mixed convection of a hybrid nanofluid flow along a vertical surface embedded in a porous medium. Bibi 15 explored the free convection of a hybrid nanofluid past a vertical plate embedded in an anisotropic permeability porous medium. Vemula et al 16 recently investigated the impact of internal heat generation and the Lorentz force on unsteady hybrid nanoliquid flow and heat transmission along a moving plate with nonuniform temperature.…”

Section: Introductionmentioning

confidence: 99%

Impact of hybrid nanofluids on unsteady MHD flow and heat transfer due to a moving infinite vertical plate

Rajesh

Chamkha

2021

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The objectives of this study are (i) to find exact analytical solutions to the unsteady hybrid nanofluid flow and heat transfer due to a moving infinite flat plate, and (ii) to investigate the impacts of different hybrid nanofluids (Cu-Al 2 O 3 /water, CuO-Al 2 O 3 /water, and Ag-Al 2 O 3 /water) on the unsteady flow and heat transfer characteristics with MHD and variable temperature. The Laplace transform technique is employed How to cite this article: Rajesh V, Chamkha AJ. Impact of hybrid nanofluids on unsteady MHD flow and heat transfer due to a moving infinite vertical plate.

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Free convection of a hybrid nanofluid past a vertical plate embedded in a porous medium with anisotropic permeability

Cited by 18 publications

References 37 publications

Numerical investigation of the thermo‐hydraulic performance of water‐based nanofluids in a dimpled channel flow using Al₂O₃, CuO, and hybrid Al₂O₃–CuO as nanoparticles

Numerical investigation of the thermo‐hydraulic performance of water‐based nanofluids in a dimpled channel flow using Al₂O₃, CuO, and hybrid Al₂O₃–CuO as nanoparticles

Axisymmetric flow of hybrid nanofluid due to a permeable non-linearly stretching/shrinking sheet with radiation effect

Impact of hybrid nanofluids on unsteady MHD flow and heat transfer due to a moving infinite vertical plate

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Free convection of a hybrid nanofluid past a vertical plate embedded in a porous medium with anisotropic permeability

Cited by 18 publications

References 37 publications

Numerical investigation of the thermo‐hydraulic performance of water‐based nanofluids in a dimpled channel flow using Al2O3, CuO, and hybrid Al2O3–CuO as nanoparticles

Numerical investigation of the thermo‐hydraulic performance of water‐based nanofluids in a dimpled channel flow using Al2O3, CuO, and hybrid Al2O3–CuO as nanoparticles

Axisymmetric flow of hybrid nanofluid due to a permeable non-linearly stretching/shrinking sheet with radiation effect

Impact of hybrid nanofluids on unsteady MHD flow and heat transfer due to a moving infinite vertical plate

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Numerical investigation of the thermo‐hydraulic performance of water‐based nanofluids in a dimpled channel flow using Al₂O₃, CuO, and hybrid Al₂O₃–CuO as nanoparticles

Numerical investigation of the thermo‐hydraulic performance of water‐based nanofluids in a dimpled channel flow using Al₂O₃, CuO, and hybrid Al₂O₃–CuO as nanoparticles