Numerical analysis of a chemically reactive non-Newtonian nanofluid flow over an exponentially stretching curved Riga sheet

Abstract

We considered second-grade fluid flow over an exponentially stretching curved Riga sheet. The Riga curved sheet is considered permeable. The chemical reaction has been studied with the effects of thermophoresis and Brownian motion. The governing equations of the system are derived using a boundary layer approximation and are formulated as a set of partial differential equations. The equations are transformed into ordinary differential equations using similarity transformations, which are then solved by a numerical scheme. The results are presented in graphs and tables, which examined the effects of fundamental physical parameters on velocity, temperature, concentration functions, skin friction, Nusselt number, and Sherwood number. Velocity declines with increasing porosity as the medium becomes more permeable, redirecting fluid into the porous structure and reducing boundary layer velocity. An increase in the chemical reaction decreases the temperature profile because the reaction absorbs thermal energy from the fluid. As Brownian motion increases, the thermal boundary layer becomes thicker, reducing the temperature gradient near the surface and leading to a lower Nusselt number. Velocity curves become declining behavior owing to development in porosity factor.