Role of magnetic field and cavity inclination on double diffusive mixed convection in rectangular enclosed domain

Moolya, Shivananda; Satheesh, A.

doi:10.1016/j.icheatmasstransfer.2020.104814

Cited by 41 publications

(8 citation statements)

References 25 publications

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“…A numerical scheme of finite element method is applied to solve the set of nonlinear partial differential Equations ( 12)- (16). For this purpose, we use Newton's linearization method to convert the nonlinear partial differential equations PDEs into linear equations.…”

Section: Numerical Solution and Validationmentioning

confidence: 99%

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Mixed Convection of Hybrid Nanofluid in an Inclined Enclosure with a Circular Center Heater under Inclined Magnetic Field

et al. 2021

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The hybrid nanofluids have efficient thermal networking due to the trade-off between the pros and cons of the more than one type of suspension. In the current study, water-based hybrid nanofluid is used to investigate mixed convection in a squared enclosure heated with a circular center heater. The cavity is placed inclined under the uniform inclined magnetic field. The squared cavity comprises of two adiabatic vertical walls and two cold horizontal walls. The governing equations are normalized using a suitable set of variables and are solved with the finite element method. A comparison is provided with previously reported results at limiting case. The grid independence is examined for the Nusselt number at the central heater. The analysis reveals the effective role of the concentration of hybrid nanofluid particles in enhancing the heat spread. The results indicate that adding 2% concentration of Ag-MgO hybrid nanoparticles causes an 18.3% uprise in the Nusselt number at the central heater. The heat transfer rate enhances for increasing Hartmann number between 0 and 10 but decreases over 10. For better heat transfer augmentation, a heater with a smaller radius is recommended for the free convection. In contrast, a heater with a larger radius serves the purpose in case of forced convection.

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Section: Numerical Solution and Validationmentioning

confidence: 99%

“…Moolya and Satheesh [16] analyzed the combined effects of heat and mass transfer and noticed a rise in the Nusselt and Sherwood numbers with an increasing inclination angle. Behzadi, et al [17] examined the impacts of the porous medium on the thermal performance in a ventilated square cavity.…”

Section: Introductionmentioning

confidence: 99%

Mixed Convection of Hybrid Nanofluid in an Inclined Enclosure with a Circular Center Heater under Inclined Magnetic Field

et al. 2021

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“…Several examinations have taken into account the influence of an external magnetic field in recent times (Mansour et al. , 2019; Moolya and Satheesh, 2020; Zhang et al. , 2021; El-Shorbagy et al.…”

Section: Introductionmentioning

confidence: 99%

“…Iftikhar et al (2023) examined how MHD affects convective flow and heat transfer characteristics in a U-shaped cavity containing both water and ferrofluid. Several examinations have taken into account the influence of an external magnetic field in recent times (Mansour et al, 2019; Entropy generation Moolya and Satheesh, 2020;Zhang et al, 2021;El-Shorbagy et al, 2021;Algehyne et al, 2023).…”

Section: Introductionmentioning

confidence: 99%

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

Algehyne

2024

HFF

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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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“…MHD Casson fluid past a vertically inclined plane in a porous medium with double-D = diffusion convective flow is discussed by Sailaja et al [ 26 ]. Double-diffusion effect on mixed convection flow in the existence of static magnetic field within rectangular domain is investigated by Moolya and Satheesh [ 27 ].…”

Section: Introductionmentioning

confidence: 99%

Further analysis of double-diffusive flow of nanofluid through a porous medium situated on an inclined plane: AI-based Levenberg–Marquardt scheme with backpropagated neural network

Shoaib

Tabassum

Raja

et al. 2022

J Braz. Soc. Mech. Sci. Eng.

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The present article exploits a novel application of AI-based Levenberg–Marquardt scheme with backpropagated neural network (LMS–BPNN) to analyze the double-diffusive free convection nanofluid flow model (DDFC-NFM) over an inclined plate in the existence of Brownian motion and thermophoresis properties embedded in a porous medium. The governing PDEs representing DDFC-NFM are transformed into system of nonlinear ODEs by applying suitable transformation. The reference data set is generated from Lobatto III-A numerical solver by variation of magnetic field parameter ( M ), thermal Grashof number (Gr), angle of inclination ( α ), Brownian motion parameter (Nb), Dufour-solutal Lewis number (Ld), modified Dufour parameter (Nd) and thermophoresis parameter (Nt) for all scenarios of the designed LMS–BPNN. The approximate solution and its comparison with standard solution are analyzed by execution of training, testing and validation procedure of the designed LMS–BPNN. The effectiveness and reliable performance of LMS–BPNN are endorsed with MSE-based fitness curve, regression analysis, error histogram analysis and correlation index. Results reveal that velocity increases with the rise in Gr, whereas reverse trend has been noticed for angle of inclination and magnetic field parameter and the temperature profile increases with the increase in Nb, Nd and Nt. The solutal concentration profile increases with the increment in Ld, while an increase in Nd causes a decrease in it. When Nt increases, the enhancement in the nanoparticle volume frictions occurs, but an opposite behavior is depicted for Brownian motion parameter.

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Role of magnetic field and cavity inclination on double diffusive mixed convection in rectangular enclosed domain

Cited by 41 publications

References 25 publications

Mixed Convection of Hybrid Nanofluid in an Inclined Enclosure with a Circular Center Heater under Inclined Magnetic Field

Mixed Convection of Hybrid Nanofluid in an Inclined Enclosure with a Circular Center Heater under Inclined Magnetic Field

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

Further analysis of double-diffusive flow of nanofluid through a porous medium situated on an inclined plane: AI-based Levenberg–Marquardt scheme with backpropagated neural network

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