MHD flow and heat transfer of hybrid nanofluid over a permeable moving surface in the presence of thermal radiation
International Journal of Numerical Methods for Heat & Fluid Flow
ISSN: 0961-5539
Article publication date: 1 July 2020
Issue publication date: 10 March 2021
Abstract
Purpose
This paper aims to investigate the flow and heat transfer characteristics of a hybrid nanofluid (Cu-Al2O3/water) in the presence of magnetohydrodynamics and thermal radiation over a permeable moving surface.
Design/methodology/approach
By choosing appropriate similarity variables, the partial differential equations are transformed into a system of linear equations which are solved by using the boundary value problem solver (bvp4c) in MATLAB. The implementation of stability analysis verifies the achievable result of the first solution which is considered stable while the second solution is unstable.
Findings
The findings revealed that the presence of a magnetic field and suction slows down the fluid motion because of the synchronism of the magnetic and electric field occurred from the formation of the Lorentz force. Also, the enhancement of the thermal radiation parameter escalates the heat transfer rate of the current study.
Originality/value
The present study is addressing the problem of MHD flow and heat transfer analysis of a hybrid nanofluid towards a permeable moving surface, with the consideration of the thermal radiation effect. The authors show that in both cases of assisting and opposing flow, there exist dual solutions within a specific range of the moving parameters. A stability analysis approved that only one of the solutions are physically relevant.
Keywords
Acknowledgements
The authors would like to sincerely thank Universiti Kebangsaan Malaysia, Universiti Teknikal Malaysia Melaka and the Ministry of Higher Education Malaysia for the financial and endless support. This work is also supported by the Research University Grant (GUP-2019–034) from the Universiti Kebangsaan Malaysia. Further, the fruitful feedbacks and suggestions by the competent reviewers are very much appreciated.
Conflict of Interest Statement: The authors declare that there is no actual or potential conflict of interest with mathematical expressions and explanations on mathematical terms, including any financial, personal, or other relationships with other people or organizations.
Citation
Zainal, N.A., Nazar, R., Naganthran, K. and Pop, I. (2021), "MHD flow and heat transfer of hybrid nanofluid over a permeable moving surface in the presence of thermal radiation", International Journal of Numerical Methods for Heat & Fluid Flow, Vol. 31 No. 3, pp. 858-879. https://doi.org/10.1108/HFF-03-2020-0126
Publisher
:Emerald Publishing Limited
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