MHD convective flow of Ag–TiO<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si6.svg" display="inline" id="d1e1283"><mml:msub><mml:mrow/><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:math> hybrid nanofluid in an inclined porous annulus with internal heat generation

Reddy, N. Keerthi; Swamy, H.A. Kumara; Sankar, M.; Jang, Bongsoo

doi:10.1016/j.csite.2023.102719

Cited by 28 publications

(13 citation statements)

References 52 publications

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“…The mathematical expressions representing these thermophysical properties can be found in Table 2. The equations governing the behavior of fluids are outlined below (Mansour et al, 2019;Geridonmez and Oztop, 2022;Reddy et al, 2023;Vinodhini and Prasad, 2023;Thirumalaisamy and Reddy, 2023;Iftikhar et al, 2023):…”

Section: Mathematical Formulationmentioning

confidence: 99%

“…Dogonchi et al (2021) explored the natural convection heat transfer behavior of an Al 2 O 3 -water nanofluid, with a particular emphasis on the impacts of radiation parameters, porous media and the presence of a magnetic field. Further research on natural convection configurations is in the cited references (Basak et al, 2011;Geridonmez and Oztop, 2022;Reddy et al, 2023;Vinodhini and Prasad, 2023;Grosan et al, 2023;Thirumalaisamy and Reddy, 2023).…”

Section: Introductionmentioning

confidence: 99%

“…Further research on natural convection configurations is in the cited references (Basak et al. , 2011; Geridonmez and Oztop, 2022; Reddy et al. , 2023; Vinodhini and Prasad, 2023; Grosan et al.…”

Section: Introductionmentioning

confidence: 99%

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Comparative analysis of entropy generation and heat transfer in a tilted partially heated square enclosure using the finite difference method

Algehyne

2024

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Purpose In recent times, there has been a growing interest in buoyancy-induced heat transfer within confined enclosures due to its frequent occurrence in heat transfer processes across diverse engineering disciplines, including electronic cooling, solar technologies, nuclear reactor systems, heat exchangers and energy storage systems. Moreover, the reduction of entropy generation holds significant importance in engineering applications, as it contributes to enhancing thermal system performance. This study, a numerical investigation, aims to analyze entropy generation and natural convection flow in an inclined square enclosure filled with Ag–MgO/water and Ag–TiO2/water hybrid nanofluids under the influence of a magnetic field. The enclosure features heated slits along its bottom and left walls. Following the Boussinesq approximation, the convective flow arises from a horizontal temperature difference between the partially heated walls and the cold right wall. Design/methodology/approach The governing equations for laminar unsteady natural convection flow in a Newtonian, incompressible mixture is solved using a Marker-and-Cell-based finite difference method within a customized MATLAB code. The hybrid nanofluid’s effective thermal conductivity and viscosity are determined using spherical nanoparticle correlations. Findings The numerical investigations cover various parameters, including nanoparticle volume concentration, Hartmann number, Rayleigh number, heat source/sink effects and inclination angle. As the Hartmann and Rayleigh numbers increase, there is a significant enhancement in entropy generation. The average Nusselt number experiences a substantial increase at extremely high values of the Rayleigh number and inclination. Practical implications This numerical investigation explores advanced applications involving various combinations of influential parameters, different nanoparticles, enclosure inclinations and improved designs. The goal is to control fluid flow and enhance heat transfer rates to meet the demands of the Fourth Industrial Revolution. Originality/value In a 90° tilted enclosure, the addition of 5% hybrid nanoparticles to the base fluid resulted in a 17.139% increase in the heat transfer rate for Ag–MgO nanoparticles and a 16.4185% increase for Ag–TiO2 nanoparticles compared to the base fluid. It is observed that a 5% nanoparticle volume fraction results in an increased heat transfer rate, influenced by variations in both the Darcy and Rayleigh numbers. The study demonstrates that the Ag–MgO hybrid nanofluid exhibits superior heat transfer and fluid transport performance compared to the Ag–TiO2 hybrid nanofluid. The simulations pertain to the use of hybrid magnetic nanofluids in fuel cells, solar cavity receivers and the processing of electromagnetic nanomaterials in enclosed environments.

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Section: Mathematical Formulationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Comparative analysis of entropy generation and heat transfer in a tilted partially heated square enclosure using the finite difference method

Algehyne

2024

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“…Now there are many studies on analysis of convective heat transport and entropy production as a key parameter illustrating stability of working for technical systems in the case of nanofluid circulation under the magnetic field influence (Tasnim et al , 2023; Afsana et al , 2021; Shenoy et al , 2016; Merkin et al , 2021; Parveen and Mahapatra, 2019; Gibanov et al , 2018; Rashad et al , 2018; Alshuhail et al , 2023; Vallejo et al , 2022; Mansour et al , 2018; Jiang et al , 2023; Reddy et al , 2023). Thus, Tasnim et al (2023) have investigated computationally the conjugate thermal convection with entropy analysis for mono-nanoliquid in an inclined enclosure with two thermally producing blocks with uniform Lorentz effect using the commercial software “COMSOL Multiphysics.” The authors have ascertained that an increase in nanoadditives concentration and Lorentz influence rate characterizes the heat transfer degradation, while the highest heat performance is for the horizontal orientation of the chamber.…”

Section: Introductionmentioning

confidence: 99%

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

Roşca

Pop

et al. 2023

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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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“…These studies have consequences for an extensive choice of applications, with groundwater flow, oil and gas recovery and biomedical engineering, where porous media plays a vital role in the flow of fluids through subsurface rock formations. Researchers have used a range of experimental, numerical and theoretical approaches to study the flow in porous media, and have found that it can exhibit a wide range of behaviours, including channelling, fingering and fracturing (Sivasankaran et al , 2020; Anum Shafiq et al , 2020; Joyce et al , 2023; Trimbitas et al , 2014; Mandal et al , 2023; Reddy and Sankar, 2023; Ramesh et al , 2022; Rashad et al , 2023; Sivasankaran and Bhuvaneswari, 2022; swamy et al , 2023; Sivasankaran and Mallawi, 2021; Keerthi Reddy et al , 2023).…”

Section: Introductionmentioning

confidence: 99%

Magneto-convective hybrid nanofluid slip flow over a moving inclined thin needle in a Darcy-Forchheimer porous medium with viscous dissipation

Hakeem,

S.,

Bhose

et al. 2023

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Purpose The purpose of this study is to provide that porous media and viscous dissipation are crucial considerations when working with hybrid nanofluids in various applications.Recent years have witnessed significant progress in optimizing these fluids for enhanced heat transfer within porous (Darcy–Forchheimer) structures, offering promising solutions for various industries seeking improved thermalmanagement and energy efficiency. Design/methodology/approach The first step is to transform the original partial differential equations into a system of first-order ordinary differential equations (ODEs). The fourth-order Runge–Kutta method is chosen for its accuracy in solving ODEs. The present study investigates the free convective boundary layer flow of hybrid nanofluids over a moving thin inclined needle with the slip flow brought about by inclined Lorentz force and Darcy–Forchheimer porous matrix, viscous dissipation. Findings It is found that slip conditions (velocity and Thermal) exist for a range of the natural convection boundary layer flow. In the hybrid nanofluid flow, which consists of Al2O3 and Fe3O4 are nanoparticles, H2O − C2H6O2 (50:50) are considered as the base fluid. The consequence of the governing parameter on the momentum and temperature profile distribution is graphically depicted. The range of the variables is 1 ≤ M ≤ 4, 1 ≤ d ≤ 2.5, 1 ≤ δ ≤ 4, 1 ≤ Fr ≤ 7, 1 ≤ Kr ≤ 7 and 0.5≤λ ≤ 3.5. The Nusselt number and skin friction factors are used to calculate the numerical values of various parameters, which are displayed in Table 4. These analyses elucidate that upsurges in the value of the Fr noticeably diminish the momentum and temperature. It is investigated to see if the contemporary results are in outstanding promise with the outcomes reported in earlier works. Practical implications The results can be very helpful to improve the energy efficiency of thermal systems. Social implications The hybrid nanofluids in heat transfer have the potential to improve the energy efficiency and performance of a wide range of systems. Originality/value This study proposes that in the combined effects of hybrid nanofluid properties, the inclined Lorentz force, the Darcy–Forchheimer model for porous media and viscous dissipation on the boundary layer flow of a conducting fluid over a moving thin inclined needle. Assessing the potential practical applications of the hybrid nanofluids in inclined needles, this could involve areas such as biomedical engineering, drug delivery systems or microfluidic devices. In future should explore the benefits and limitations of using hybrid nanofluids in these applications.

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MHD convective flow of Ag–TiO2 hybrid nanofluid in an inclined porous annulus with internal heat generation

Cited by 28 publications

References 52 publications

Comparative analysis of entropy generation and heat transfer in a tilted partially heated square enclosure using the finite difference method

Comparative analysis of entropy generation and heat transfer in a tilted partially heated square enclosure using the finite difference method

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

Magneto-convective hybrid nanofluid slip flow over a moving inclined thin needle in a Darcy-Forchheimer porous medium with viscous dissipation

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