Magneto-hydrothermal convective dynamics of hybrid nanofluid-packed partially cooled porous cavity: effect of half-sinusoidal heating

Mondal, Milan K.; Biswas, Nirmalendu; Datta, Aparesh; Mandal, Dipak Kumar; Manna, Nirmal K.

doi:10.1007/s10973-023-11959-y

Cited by 28 publications

(13 citation statements)

References 55 publications

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“…The finite-volume approach and the SIMPLE algorithm were used to iteratively solve the governing equations. A proprietary code built on FORTRAN is used to implement these HFF 34,4 solutions (Biswas et al, 2021b;Mondal et al, 2023aMondal et al, , 2023b. The finite volume method converts partial differential equations into algebraic equations.…”

Section: Numerical Techniquementioning

confidence: 99%

“…Mehrez et al (2015) investigated Cu-water nanofluid on a slope with a magnetic field, reporting heat transmission variations with inclination angles. Qureshi et al (2021) explored a cavity with a revolving cylinder obstacle, noting increased heat transmission with an expanding cylinder radius. Mondal et al (2019) investigated a partly lid-driven cavity with porous media and a magnetic field, observing heat removal increases with Darcy and Grashof numbers.…”

Section: Introductionmentioning

confidence: 99%

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Effects of heater positions on magneto-hydrodynamic convection of CuO-water nanofluid flow in a grooved channel

Rahaman,

Biswas,

Santra

et al. 2024

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Purpose This study aims to delve into the coupled mixed convective heat transport process within a grooved channel cavity using CuO-water nanofluid and an inclined magnetic field. The cavity undergoes isothermal heating from the bottom, with variations in the positions of heated walls across the grooved channel. The aim is to assess the impact of heater positions on thermal performance and identify the most effective configuration. Design/methodology/approach Numerical solutions to the evolved transport equations are obtained using a finite volume method-based indigenous solver. The dimensionless parameters of Reynolds number (1 ≤ Re ≤ 500), Richardson number (0.1 ≤ Ri ≤ 100), Hartmann number (0 ≤ Ha ≤ 70) and magnetic field inclination angle (0° ≤ γ ≤ 180°) are considered. The solved variables generate both local and global variables after discretization using the semi-implicit method for pressure linked equations algorithm on nonuniform grids. Findings The study reveals that optimal heat transfer occurs when the heater is positioned at the right corner of the grooved cavity. Heat transfer augmentation ranges from 0.5% to 168.53% for Re = 50 to 300 compared to the bottom-heated case. The magnetic field’s orientation significantly influences the average heat transfer, initially rising and then declining with increasing inclination angle. Overall, this analysis underscores the effectiveness of heater positions in achieving superior thermal performance in a grooved channel cavity. Research limitations/implications This concept can be extended to explore enhanced thermal performance under various thermal boundary conditions, considering wall curvature effects, different geometry orientations and the presence of porous structures, either numerically or experimentally. Practical implications The findings are applicable across diverse fields, including biomedical systems, heat exchanging devices, electronic cooling systems, food processing, drying processes, crystallization, mixing processes and beyond. Originality/value This work provides a novel exploration of CuO-water nanofluid flow in mixed convection within a grooved channel cavity under the influence of an inclined magnetic field. The influence of different heater positions on thermomagnetic convection in such a cavity has not been extensively investigated before, contributing to the originality and value of this research.

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Section: Numerical Techniquementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effects of heater positions on magneto-hydrodynamic convection of CuO-water nanofluid flow in a grooved channel

Rahaman,

Biswas,

Santra

et al. 2024

HFF

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“…These equations can be integrated to determine the streamfunction and heatfunction distributions within the domain from the computed velocity and temperature fields [U X (X, Y), U Y (X, Y) and u(X, Y)] (Arani et al, 2018;Hooman, 2010;Hu et al, 2016;Jo and Kim, 2017;Lima and Ganzarolli, 2016;Mahdavi et al, 2021;Manna et al, 2021Manna et al, , 2019Mondal et al, 2023Mondal et al, , 2022Omri et al, 2022;Zhang et al, 2019Zhang et al, , 2017. Current work follows the "integration route" to plot streamlines and heatlines within various domains based on the standard MATLAB routines.…”

Section: Solutionsmentioning

confidence: 99%

Revisit on energy flow: accurate predictions and analysis of heatlines for thermal convection within enclosures of various configurations

Bhattacharya

Basak

2023

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Purpose A few earlier studies presented infeasible heatline trajectories for natural convection within annular domains involving an inner circular cylinder and outer square/circular enclosure. The purpose of this paper is to revisit and illustrate the correct heatline trajectories for various test cases. Design/methodology/approach Galerkin finite element based methodology and space adaptive grid have been used to simulate natural convective flows within the annular domains. The prediction of heatlines involves derivatives at the nodes, which are evaluated based on finite element basis functions and contributions from neighboring elements. Findings The heatlines in the earlier work indicate infeasible heat flow paths such as heat flow from one portion to the other of isothermal hot walls and heat flow across the adiabatic walls. Current results illustrate physically consistent heat flow paths involving perpendicularly emerging heatlines from hot to cold walls for conductive transport, long heat flow paths around the closed-loop heatline cells for convective transport and parallel layout of heatlines to the adiabatic walls. Results also demonstrate complex heatlines involving multiple flow vortices and complex flow structures. Originality/value Current work translates heatfunctions from energy flux vectors, which are determined by using basis sets. This work demonstrates the expected heatline trajectories for various scenarios involving conductive and convective heat transport within enclosures with an inner hot object as a first attempt, and the results are precursors for the understanding of energy flow estimates.

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“…The details of an acceptable numerical scheme provide an in-depth understanding eventually leading to improved system design. Brinkman-Forchheimer-Darcy formulation for the body force is popularly deployed in the momentum conservation equation for flow through porous structures (Selimefendigil and Chamkha, 2021;Manna et al, 2021bManna et al, , 2021aMondal et al, 2023a;Biswas et al, 2023). Maxwell equations come into play for modeling the magnetically induced body force (Sheremet et al, 2016;Ghasemi and Siavashi, 2017;Manna et al, 2021bManna et al, , 2021a.…”

Section: Introductionmentioning

confidence: 99%

“…Porous materials are used to enhance convective heat transfer in many devices such as fuel cells and packed beds (Jadidi et al , 2022; Duan et al , 2021; Alonso and Rojas, 2022; Mondal et al , 2023b). Porosity and the temperature gradient in the ground are the key factors that impart to the water purification and CO 2 sequestration abilities (Dhivagar et al , 2023; Bouzgarrou et al , 2023).…”

Section: Introductionmentioning

confidence: 99%

Multi-segmental heating of facing vertical walls in porous systems filled with hybrid nanofluid in a constant-strength magnetic environment

Pandit,

Mondal,

Sanyal

et al. 2024

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Purpose This study aims to undertake a comprehensive examination of heat transfer by convection in porous systems with top and bottom walls insulated and differently heated vertical walls under a magnetic field. For a specific nanofluid, the study aims to bring out the effects of different segmental heating arrangements. Design/methodology/approach An existing in-house code based on the finite volume method has provided the numerical solution of the coupled nondimensional transport equations. Following a validation study, different explorations include the variations of Darcy–Rayleigh number (Ram = 10–104), Darcy number (Da = 10–5–10–1) segmented arrangements of heaters of identical total length, porosity index (ε = 0.1–1) and aspect ratio of the cavity (AR = 0.25–2) under Hartmann number (Ha = 10–70) and volume fraction of φ = 0.1% for the nanoparticles. In the analysis, there are major roles of the streamlines, isotherms and heatlines on the vertical mid-plane of the cavity and the profiles of the flow velocity and temperature on the central line of the section. Findings The finding of a monotonic rise in the heat transfer rate with an increase in Ram from 10 to 104 has prompted a further comparison of the rate at Ram equal to 104 with the total length of the heaters kept constant in all the cases. With respect to uniform heating of one entire wall, the study reveals a significant advantage of 246% rate enhancement from two equal heater segments placed centrally on opposite walls. This rate has emerged higher by 82% and 249%, respectively, with both the segments placed at the top and one at the bottom and one at the top. An increase in the number of centrally arranged heaters on each wall from one to five has yielded 286% rate enhancement. Changes in the ratio of the cavity height-to-length from 1.0 to 0.2 and 2 cause the rate to decrease by 50% and increase by 21%, respectively. Research limitations/implications Further research with additional parameters, geometries and configurations will consolidate the understanding. Experimental validation can complement the numerical simulations presented in this study. Originality/value This research contributes to the field by integrating segmented heating, magnetic fields and hybrid nanofluid in a porous flow domain, addressing existing research gaps. The findings provide valuable insights for enhancing thermal performance, and controlling heat transfer locally, and have implications for medical treatments, thermal management systems and related fields. The research opens up new possibilities for precise thermal management and offers directions for future investigations.

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Magneto-hydrothermal convective dynamics of hybrid nanofluid-packed partially cooled porous cavity: effect of half-sinusoidal heating

Cited by 28 publications

References 55 publications

Effects of heater positions on magneto-hydrodynamic convection of CuO-water nanofluid flow in a grooved channel

Effects of heater positions on magneto-hydrodynamic convection of CuO-water nanofluid flow in a grooved channel

Revisit on energy flow: accurate predictions and analysis of heatlines for thermal convection within enclosures of various configurations

Multi-segmental heating of facing vertical walls in porous systems filled with hybrid nanofluid in a constant-strength magnetic environment

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