Hybrid nanofluid mixed convection in a cavity under the impact of the magnetic field by lattice Boltzmann method: Effects of barrier temperature on heat transfer and entropy

Aljaloud, Amjad Salamah M

doi:10.1016/j.enganabound.2022.12.007

Cited by 19 publications

(2 citation statements)

References 53 publications

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“…The chemical characteristics of the hybrid nanoliquid were (Shenoy et al , 2016; Aljaloud, 2024): hybrid nanosuspension density ρ hnf = ϕ Ag ρ Ag + ϕ MgO ρ MgO + (1−ϕ hnf )ρ f ; and hybrid nanosuspension buoyancy parameter: hybrid nanosuspension thermal capacity: hybrid nanofluid thermal conductivity (Esfe et al , 2015): hybrid nanofluid viscosity (Esfe et al , 2015): …”

Section: Governing Equations and Conditionsmentioning

confidence: 99%

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Natural convection and entropy generation in a trapezoidal region with hybrid nanoliquid under magnetic field

Roşca

Pop

et al. 2023

HFF

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Purpose This paper aims to study numerically the steady natural convective heat transfer of a hybrid nanosuspension (Ag-MgO/H2O) within a partially heated/cooled trapezoidal region with linear temperature profiles at inclined walls under an effect of uniform Lorentz force. This investigation is useful for researchers studying in the area of cavity flows to know features of the flow structures and nature of hybrid nanofluid characteristics. In addition, a detailed entropy generation analysis has been performed to highlight possible regimes with minimal entropy generation rates. Design/methodology/approach The governing equations formulated using the Oberbeck–Boussinesq approach and single-phase nanoliquid model are transformed to a non-dimensional form by using non-dimensional variables. The obtained equations with appropriate boundary conditions are resolved by the finite difference technique. The developed code has been validated comprehensively. Analysis has been performed for a wide range of governing parameters, including Rayleigh number (Ra = 105), Prandtl number (Pr = 6.82), Hartmann number (Ha = 0–100), magnetic field inclination angle (φ = 0–?/2) and nanoparticles volume fraction (φhnf = 0 and 2%). Findings It has been shown that inclined magnetic field can be used to manage the energy transport performance. An inclusion of nanoparticles without Lorentz force influence allows forming more stable convective regime with descending heat plume in the central zone, while such a regime was performed for clear fluid only for moderate and high Hartmann numbers. Moreover, the average overall entropy generation can be decreased with a growth of the Hartmann number, while an addition of hybrid nanoparticles allows reducing this parameter for Ha = 30 and 50. The average Nusselt number can be increased with a growth of the nanoparticles concentration for low values of the magnetic field intensity. Originality/value Governing equations written using the conservation laws and dimensionless non-primitive variables have been resolved by the finite difference approach. The created numerical code has been verified by applying the grid independence test and computational outcomes of other researchers. The comprehensive analysis for various key parameters has been performed.

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Section: Governing Equations and Conditionsmentioning

confidence: 99%

“…It has been ascertained that an increase of the porous material permeability improved the energy transfer, while Lorentz influence attenuates the transport phenomena. Other interesting and useful outcomes are in Aljaloud (2024), Ghalambaz et al (2019); Hosseinzadeh et al (2023), Korei et al (2022) and Sivaraj et al (2022).…”

Section: Introductionmentioning

confidence: 98%

Natural convection and entropy generation in a trapezoidal region with hybrid nanoliquid under magnetic field

Roşca

Pop

et al. 2023

HFF

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Thermal performance analysis of oriented MHD convective flow and entropy production of hybrid nanofluids in a cavity induced by semicircles at different radii ratios

Souayeh

2024

Z Angew Math Mech

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The current study numerically treats the magnetic field impacts on the natural convection flow and entropy generation in a square cavity filled with hybrid nanofluid and induced by two isothermally heated semicircles at the bottom and left walls of the cavity. The cavity is filled by hybrid nanofluid (titanium oxide/silver‐water) and oriented under different inclination angles with the applied magnetic field. The simulations in this study were executed via a home‐made code written in the FORTRAN programing language. The numerical methodology considered to solve the coupled equations of continuity, momentum, energy, and entropy generation equations with the associated boundary conditions is the finite volume method and the full multigrid acceleration. Various wake parameters are considered in this research study, namely, the inclination angle of the cavity (α), the magnetic field inclination (γ), the Hartmann number (Ha), the Rayleigh number (Ra), the volume fraction of the hybrid nanofluid (ϕ) and the internal semicircles radii ratio (β). The major findings issued from the impact of these parameters on the fluid flow and heat transfer characteristics reveal that heat transfer and entropy generation are a decreasing function of the Hartmann parameter. Moreover, the total entropy generation is intensified by 85.23% from Ra = 103 to Ra = 106 for Ha = 10, by 85.818% for Ha = 50 and 83.813% for Ha = 100. Besides, the flow magnitude is found decreasing with increasing the radii ratio β of the semicircles. It is also found that optimal heat transfer rates deducted from the variation of average Nusselt number versus Ra for different volume fractions of the hybrid nanoparticles are obtained for the extreme values of the pertinent parameters (β = 1, ϕ = 8%, Ra = 106). Hence, the present work offers a useful tool and a parametric study for the research community and engineers on the design and optimization of thermal management systems used in a variety of industrial applications, such as heat exchangers, nuclear reactors, and energy systems.

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Lattice Boltzmann method formulation for simulation of thermal radiation effects on non-Newtonian Al2O3 free convection in entropy determination

Nemati,

Sefid,

Karimipour

et al. 2024

Appl. Math. Mech.-Engl. Ed.

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Hybrid nanofluid mixed convection in a cavity under the impact of the magnetic field by lattice Boltzmann method: Effects of barrier temperature on heat transfer and entropy

Cited by 19 publications

References 53 publications

Natural convection and entropy generation in a trapezoidal region with hybrid nanoliquid under magnetic field

Natural convection and entropy generation in a trapezoidal region with hybrid nanoliquid under magnetic field

Thermal performance analysis of oriented MHD convective flow and entropy production of hybrid nanofluids in a cavity induced by semicircles at different radii ratios

Lattice Boltzmann method formulation for simulation of thermal radiation effects on non-Newtonian Al2O3 free convection in entropy determination

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