Wall Shear Stress and Heat Transfer Analysis of Hybrid Nanofluid Flow Across a Riga Parallel Plate With Non‐Uniform Heat Source/Sink and Activation Energy: Sensitivity Analysis Approach

ABSTRACT Engineers can accomplish customised thermal properties that maximise fluid performance in various operating scenarios by hybridising alloy nanoparticles. The present study provides new insights into the heat and mass transfer of the squeezing flow of hybrid nanofluid between the parallel Riga plates under the impacts of shape effects, non‐uniform heat generation/absorption and activation energy. A suitable similarity approach is implemented to transform governing equations into non‐linear systems of ordinary differential equations and is solved numerically using the bvp‐5c technique. The results show that the velocity profile increases near the lower plate and decreases near the upper plate. In contrast, both the temperature and concentration profiles rise for growing values of the squeezing number. It is found that both temperature and concentration profile rise for augmented values of the Biot number parameters. Also, engineering factors are discussed graphically with specific parameters. Further, properly aligned residual plots and less variance in fitted values reveal the response surface methodology's great accuracy and validity. And from the sensitivity analysis, it is observed that the Skin friction has a positive influence for Hartman and porosity parameters and negative influence for squeezing parameter also the Nusselt number has a negative sensitivity for both squeezing and Biot number and less positive sensitive to the Hartman number.