Computational Simulation of Thermo-Mass Diffusion and Coupled Magnetohydrodynamic Nanofluid Flow over a Nonlinear Stretching Sheet

Abstract

In this study to examine the steady 2-Dimensional flow of nanofluids over a nonlinear stretching sheet under the influence of a magnetic field (MHD) and thermal-mass diffusion effects. The governing equation was solved numerically to examine the different parameters of velocity, temperature, and concentration profile. The effect of key dimensionless quantities such as skin friction coefficient, Nusselt number, and Sherwood number is analysed for varying Hartmann number (M), power-law index (n), Brownian parameter (Nb), thermophoresis (Nt), Prandtl number (Pr), and Lewis number (Le). It is found that the graphical results show that increasing M suppresses velocity due to the Lorentz force, while higher Pr enhances the Nusselt number, signifying more effective heat transfer. The findings demonstrate that the concentration parameter of the nanoparticle near the surface decreases due to the thermophoresis parameter Nt, influencing the Sherwood number. A notable enhancement observed in the thermal performance of nano fluids Al₂O₃-Water due to high conductivity. The findings suggest that a comparison with the study by Khan and Pop (2010) confirms that thermophoresis and Brownian motion knowingly influence heat and mass transfer in nanofluid flows. Finally, the comprehensive parametric study is beneficial for using the nanofluids in solar collectors, microelectronics, and biomedical devices.