A Numerical Analysis of MHD Micropolar Hybrid Nanofluid Flow Over a Porous Stretching/Shrinking Sheet

This study investigates the behaviour of a two-dimensional, time-independent, and incompressible magnetohydrodynamic (MHD) flow of a hybrid nanofluid made of water and single-walled carbon nanotubes (SWCNT) and multi-walled carbon nanotubes (MWCNT). The research centers on analyzing a sheet undergoing stretching or shrinking within a porous medium subject to suction and a no-slip condition. It examines the influences of thermal radiation, heat generation, viscous dissipation, and Joule heating on the system. Through a suitable similarity transformation, nonlinear ordinary differential equations are derived from the governing equations, and the Keller-box numerical method is utilized to solve them. Our analysis includes graphical representations of the velocity profile, angular velocity profile, and temperature profile. Our findings indicate that the hybrid nanofluid consisting of SWCNTs and MWCNTs in water yields better results than other hybrid nanofluids, as well as single nanoparticle nanofluids. This study also offers a comprehensive comparison with previously published works. The research fills a gap in the current understanding of the behaviour of hybrid nanofluids in MHD flows, and has important implications for practical engineering problems.