MHD mixed convection stagnation-point flow of Cu-Al2O3/water hybrid nanofluid over a permeable stretching/shrinking surface with heat source/sink

This study focused on Cu-Al2O3/water hybrid nanofluid to address the issue related to mixed convection stagnation-point flow and heat transfer over a permeable stretching/shrinking sheet with the magnetic field and heat source/sink effects. The governing equations of the problem are initially reduced into similarity equations by utilising similarity transformations, prior to being solved numerically using the function bvp4c in MATLAB. As a result, dual (upper and lower branches) solutions were obtained in opposing and assisting flow regions. The outcomes derived from stability analysis indicated that the upper branch solution was stable, while unstable for the lower branch. Additionally, the heat transfer rate of base fluid (water) was higher than the hybrid nanofluid. (C) 2020 Elsevier Masson SAS. All rights reserved.