Magnetohydrodynamic Mixed Convection of a Non-Newtonian Nanofluid over a Vertical Cylinder: Slip Effects, Heat Transfer Enhancement, and Entropy Generation

Articles in Press

Document Type : Research Paper

Authors
Bilal Ahmed
Ahmed Al-Radadideh
Department of General Education, Fujairah University, Al Hlaifat, 1207, Fujairah, UAE
10.22055/jacm.2026.49246.5834
Abstract
Mixed-convection magnetohydrodynamic (MHD) flows of non-Newtonian nanofluids are of considerable importance in advanced thermal management systems, energy conversion devices, and industrial cooling applications due to their enhanced heat-transfer capabilities. The primary objective of this study is to investigate the effects of magnetic field strength, velocity slip, thermal slip, and Brownian motion on the flow behavior, heat transfer characteristics, nanoparticle concentration distribution, and entropy generation in a non-Newtonian nanofluid flowing over a vertical cylinder. The governing nonlinear partial differential equations are transformed into a system of nonlinear ordinary differential equations using suitable similarity transformations and solved analytically using the Homotopy Analysis Method (HAM). The results reveal that increasing the magnetic parameter significantly suppresses the fluid velocity due to the Lorentz force while enhancing the heat transfer rate by approximately 20%. An increase in the thermal slip parameter reduces the thermal boundary layer thickness and lowers the fluid temperature distribution near the cylinder surface. Furthermore, stronger Brownian motion substantially modifies nanoparticle concentration profiles and influences heat transport within the boundary layer. Entropy generation increases with both the magnetic parameter and the temperature gradient parameter, indicating greater thermodynamic irreversibility. The present findings provide valuable guidelines for the design and optimization of nanofluid-based thermal systems, including heat exchangers, electronic cooling devices, energy transport units, and other heat transfer enhancement technologies.
Keywords
Magnetohydrodynamics (MHD)
Mixed convection flow
non-Newtonian nanofluids
Multiple slip effects
Entropy generation
Vertical cylinder
Heat and mass transfer
Thermodynamic efficiency
Nanoparticle concentration
Subjects

Publisher’s Note Shahid Chamran University of Ahvaz remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

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Journal of Applied and Computational Mechanics

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Available Online from 09 June 2026