Natural convection of a reacting hybrid nanofluid in an open porous cavity bounded by vertical wavy walls
International Journal of Numerical Methods for Heat & Fluid Flow
ISSN: 0961-5539
Article publication date: 15 June 2023
Issue publication date: 21 July 2023
Abstract
Purpose
The purpose of this study is to investigate the natural convection characteristics of a reacting hybrid nanofluid in an open porous cavity bounded by vertical wavy walls subject to an inclined magnetic field.
Design/methodology/approach
The physical domain of the problem is constructed using coordinate transformations, and the equations are transformed accordingly. The resulting equations are then solved using finite difference method. Numerical results for the streamlines, isotherms and isoconcentration are illustrated with varying relevant parameters.
Findings
Whatever the values of parameters, streamlines have two counter-rotating cells, and their intensities are the highest near the open end. Moreover, the maximum temperature and the minimum concentration are obtained in close proximity to the open end. The strength of streamlines is increased with increasing Rayleigh number, Frank-Kamenetskii number and Darcy number, whereas it is decreased with the increment of volume fractions of nanoparticles.
Research limitations/implications
The limitations of this study are that the model is suitable for thermal equilibrium cases and constant thermo-physical properties, while the results can predict two-dimensional flow behaviors.
Originality/value
To the best of the authors’ knowledge, there is no study on the natural convection induced by a chemical reaction in an open cavity bounded by vertical wavy walls. The findings might be used to gather knowledge about the flow, energy and reactant distributions in an open space containing a chemical reaction.
Keywords
Acknowledgements
This paper forms part of a special section “Entropy generation due to nanofluid flow in porous media\, micro/mini channels\, and cavities” guest editor by Dr Rajesh Ransing.
Declaration of interests: The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
Availability of data: The data that support the findings of this study are available from the corresponding author upon reasonable request.
Citation
Roy, N.C. and Monira, S. (2023), "Natural convection of a reacting hybrid nanofluid in an open porous cavity bounded by vertical wavy walls", International Journal of Numerical Methods for Heat & Fluid Flow, Vol. 33 No. 9, pp. 3202-3227. https://doi.org/10.1108/HFF-02-2023-0056
Publisher
:Emerald Publishing Limited
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