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

Md Motiur Rahaman (Department of Power Engineering, Jadavpur University, Kolkata, India)
Nirmalendu Biswas (Department of Power Engineering, Jadavpur University, Kolkata, India)
Apurba Kumar Santra (Department of Power Engineering, Jadavpur University, Kolkata, India)
Nirmal K. Manna (Department of Mechanical Engineering, Jadavpur University, Kolkata, India)

International Journal of Numerical Methods for Heat & Fluid Flow

ISSN: 0961-5539

Article publication date: 23 January 2024

Issue publication date: 29 March 2024

64

Abstract

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.

Keywords

Acknowledgements

Funding: There is no financial support for this work.

Compliance with ethical standards

Conflict of interest: The authors declare that they have no conflict of interest.

Citation

Rahaman, M.M., Biswas, N., Santra, A.K. and Manna, N.K. (2024), "Effects of heater positions on magneto-hydrodynamic convection of CuO-water nanofluid flow in a grooved channel", International Journal of Numerical Methods for Heat & Fluid Flow, Vol. 34 No. 4, pp. 1699-1729. https://doi.org/10.1108/HFF-11-2023-0695

Publisher

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Emerald Publishing Limited

Copyright © 2024, Emerald Publishing Limited

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