Numerical and experimental study of natural convection heat transfer on flat and corrugated plates
International Journal of Numerical Methods for Heat & Fluid Flow
ISSN: 0961-5539
Article publication date: 23 June 2023
Issue publication date: 21 July 2023
Abstract
Purpose
The purpose of this study is to numerically and experimentally investigate the natural convection heat transfer in flat plates and plates with square, trapezoidal and triangular corrugations.
Design/methodology/approach
This work is an extension of the previous studies by Verderio et al. (2021a, 2021b, 2021c, 2021d, 2022a). An experimental apparatus was built to measure the plates’ temperatures during the natural convection cooling process. Several physical parameters were evaluated through the experimental methodology. Free and open-source computational tools were used to simulate the experimental conditions and to quantitatively and qualitatively evaluate the thermal plume characteristics over the plates.
Findings
The numerical results were experimentally validated with reasonable accuracy in the range of studied
Practical implications
The results demonstrate that corrugated surfaces have greater thermal efficiency than flat plates in heating and/or cooling systems by natural convection. This way, corrugated plates can reduce the dependence on auxiliary forced convection systems, with application in technological areas and Industry 4.0.
Originality/value
The empirical correlations obtained for the corrected Nusselt number and thermal efficiency for the corrugated plate geometries studied are original and unpublished, as well as the experimental validation of the developed three-dimensional numerical code.
Keywords
Acknowledgements
This study was financed in part by the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior – Brasil (CAPES) – Finance Code 001. The work was further supported by FCT, through IDMEC, under LAETA, project UIDB/50022/2020.
Acknowledgments also to the Instituto Federal de Educação, Ciência e Tecnologia de São Paulo (IFSP), Araraquara campus and the Universidade Estadual Paulista “Júlio de Mesquita Filho” (UNESP), Faculdade de Engenharia (FEB), Bauru campus, for providing the resources, researchers and conditions for the production of this research project.
Citation
Verdério Júnior, S.A., Coelho, P.J., Scalon, V.L. and del Rio Oliveira, S. (2023), "Numerical and experimental study of natural convection heat transfer on flat and corrugated plates", International Journal of Numerical Methods for Heat & Fluid Flow, Vol. 33 No. 9, pp. 3286-3307. https://doi.org/10.1108/HFF-03-2023-0132
Publisher
:Emerald Publishing Limited
Copyright © 2023, Emerald Publishing Limited