Effects of partial magnetic field in a vented square cavity with aiding and opposing of MWCNT–water nanofluid flows

Geridönmez, Bengisen Pekmen; Öztop, Hakan F.

doi:10.1016/j.enganabound.2021.08.024

Cited by 31 publications

(4 citation statements)

References 45 publications

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“…Geridönmez and Öztop (2021) numerically studied a ventilated square cavity with partially opened top and bottom walls, observing increased Nusselt numbers with higher Richardson numbers for different nanofluid flow scenarios. Ezzaraa et al (2018) investigated mixed convection and radiation in a rectangular ventilated cavity, highlighting the effectiveness of the sucking mode for heat transfer.…”

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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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: 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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“…In the VECs, flow field is very complex with occurrence of multiple vortices. The distribution and size of them can be adjusted by using external MGF and varying the strength and inclination of it as it has been shown in many studies [27] , [28] , [29] .…”

Section: Introductionmentioning

confidence: 99%

Magneto-convection of nanofluid flow over multiple rotating cylinders in a confined space with elastic walls and ventilated ports

Selimefendigil,

Ghachem,

Albalawi

et al. 2024

Heliyon

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“…Additional studies have focused on the effect of nanofluids on thermal convection under different geometric configurations as reported in refs. Saha (2020), Vijaybabu (2020), Al-Chlaihawi et al (2021), Mandal et al (2022aMandal et al ( , 2022b, Mandal et al (2023), Geridonmez and Atilgan (2023).…”

Section: Introductionmentioning

confidence: 99%

Convective heat transport and entropy generation in butterfly-shaped magneto-nanofluidic systems with bottom heating and top cooling

Halder,

Bhattacharya,

Biswas

et al. 2023

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Purpose The purpose of this study is to carry out a comprehensive analysis of magneto-hydrodynamics (MHD), nanofluidic flow dynamics and heat transfer as well as thermodynamic irreversibility, within a novel butterfly-shaped cavity. Gaining a thorough understanding of these phenomena will help to facilitate the design and optimization of thermal systems with complex geometries under magnetic fields in diverse applications. Design/methodology/approach To achieve the objective, the finite element method is used to solve the governing equations of the problem. The effects of various controlling parameters such as butterfly-shaped triangle vertex angle (T), Rayleigh number (Ra), Hartmann number (Ha) and magnetic field inclination angle (γ ) on the hydrothermal performance are analyzed meticulously. By investigating the effects of these parameters, the authors contribute to the existing knowledge by shedding light on their influence on heat and fluid transport within butterfly-shaped cavities. Findings The major findings of this study reveal that the geometrical shape significantly alters fluid motion, heat transfer and irreversibility production. Maximum heat transfer, as well as entropy generation, occurs when the Rayleigh number reaches its maximum, the Hartmann number is minimized and the angle of the magnetic field is set to 30° or 150°, while the butterfly wings angle or vertex angle is kept at a maximum of 120°. The intensity of the magnetic field significantly controls the heat flow dynamics, with higher magnetic field strength causing a reduction in the flow strength as well as heat transfer. This configuration optimizes the heat transfer characteristics in the system. Research limitations/implications Further research can be expanded on this study by examining thermal performance under different curvature effects, orientations, boundary conditions and additional factors. This can be accomplished through numerical simulations or experimental investigations under various multiphysical scenarios. Practical implications The geometric configurations explored in this research have practical applications in various engineering fields, including heat exchangers, crystallization processes, microelectronic devices, energy storage systems, mixing processes, food processing, air-conditioning, filtration and more. Originality/value This study brings value by exploring a novel geometric configuration comprising the nanofluidic flow, and MHD effect, providing insights and potential innovations in the field of thermal fluid dynamics. The findings contribute a lot toward maximizing thermal performance in diverse fields of applications. The comparison of different hydrothermal behavior and thermodynamic entropy production under the varying geometric configuration adds novelty to this study.

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Effects of partial magnetic field in a vented square cavity with aiding and opposing of MWCNT–water nanofluid flows

Cited by 31 publications

References 45 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

Magneto-convection of nanofluid flow over multiple rotating cylinders in a confined space with elastic walls and ventilated ports

Convective heat transport and entropy generation in butterfly-shaped magneto-nanofluidic systems with bottom heating and top cooling

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