Sensitivity analysis of the couple stress hybrid nanofluid flow over a stretchable plate with magnetic field

This work considers the sensitivity analysis of the couple stress hybrid nanofluid flow (mixture of methanol-base fluid and AA7072-AA7075 hybrid nanoparticles) subjected to a stretching surface with magnetic field (MHD) effect. The boundary layer and energy equations are simplified and then solved using the bvp4c solver embedded in the Matlab software. The validation is conducted with the previously published results indicating that the present model is correct. The numerical results highlight the effect of the physical factors like magnetic parameter, nanoparticle's concentration and couple stress parameter on the skin friction and heat transfer rate as well as the velocity and temperature profiles. In this study, the response surface methodology (RSM) and sensitivity analysis are conducted to highlight the impact and significance of these physical factors to the selected response (heat transfer and skin friction). From this study, the parameter(s) which significantly optimizes (increase) the response is suction parameter. This work is beneficial to other researchers in identifying the significant parameters/factors which can optimize/enhance the heat transfer progress for further advanced engineering applications.