Unsteady MHD radiative-dissipative flow of Cu-Al2O3/H2O hybrid nanofluid past a stretching sheet with slip and convective conditions: A regression analysis

The current investigation is concerned with the study of unsteady laminar flow with heat and mass transfer of an incompressible and hydromagnetic Cu-Al2O3/H2O hybrid nanofluid near a nonlinearly permeable stretching sheet in the presence of nonlinear thermal radiation, viscous-Ohmic dissipation and velocity slip. Further, the impacts of heat generation/absorption, chemical reaction, convective heat and mass conditions at the boundary are also considered. The prevailing model equations are converted into dimensionless form with the implementation of some suitable similarity transformations. A shooting technique along with Runge-Kutta-Fehlberg method is used to develop the solutions for momentum, thermal and mass fields. The impingements of several controlling parameters on the velocity as well as heat and mass distributions are demonstrated and exhibited graphically. Also, the variations in the physical quantities like skin-friction coefficient, Nusselt and Sherwood numbers are delineated with the help of graphs. The analysis reveals that Hartree pressure gradient and wall velocity slip have the tendency to slow down the flow. On the other side, the velocity ratio parameter, thermal radiation and Biot number boost the fluid temperature. Furthermore, the regression analysis presents that skin-friction is more prone to the suction parameter than the Hartree pressure gradient while the Nusselt number is much sensitive to the radiation parameter as compared to the Eckert number. However, the Sherwood number is dominated by the solutal Biot number. (c) 2021 International Association for Mathematics and Computers in Simulation (IMACS). Published by Elsevier B.V. All rights reserved.

Automated summary

This study investigates the effects of nonlinear thermal radiation, viscous-Ohmic dissipation, and velocity slip on the unsteady laminar flow with heat and mass transfer. The solutions for momentum, thermal, and mass fields are obtained using the shooting method and Runge-Kutta-Fehlberg method. The graphical representations demonstrate the impacts of various parameters on the velocity, heat, and mass distributions.