Influence of autocatalytic chemical reaction with heterogeneous catalysis in the flow of Ostwald-de-Waele nanofluid past a rotating disk with variable thickness in porous media

The present study ventilates shear-dependent viscosity to examine the non-Newtonian rheology of Ostwald-deWaele nanofluid flow over a rotating disk of variable thickness in a Darcy-Forchheimer permeable medium. Heat transfer phenomenon is witnessed by adding non-uniform heat source-sink with melting heat transfer. The effectiveness of surface catalysis in the process of homogeneous and heterogeneous reactions is also analyzed. The Buongiorno nanofluid model is used for the fluid flow assumptions. The sketched model contains the system of partial differential equations. The procedure of using similarity transformation is adopted to obtain the ordinary differential equations. Simulations are performed to obtain the numerical results via the bvp4c numerical scheme. The numerical values of drag force coefficient and heat transfer rate are the properties of physical interest. Large values of Prandtl number are favorable to boost the heat transfer phenomenon. The thermal profile is increased for both pseudoplastic and dilatant fluid models. The power-law index is more influential than the disk thickness index. Surface catalysis triggers the reaction more efficiently.