Irreversibility and Controlled Entropy Generation for Squeezing Sutterby Nanofluid Flow With Joule Heating and Arrhenius Activation Energy

Entropy generation, which represents the irreversible losses from heat transfer, fluid friction, and other dissipative effects, is crucial for optimizing thermodynamic systems and enhancing energy efficiency in applications like cooling systems, energy storage, and heat exchangers. This study aims to model and analyze the irreversibility in the squeezing flow of a Sutterby nanofluid confined between two parallel plates. The governing equations incorporate the effects of the squeezing parameter, magnetic field, nonlinear radiation, Joule heating, heat generation/absorption, and Arrhenius activation energy. By applying similarity transformations, the partial differential equations are converted into a system of ordinary differential equations, which are then solved numerically using the finite difference method. The numerical results are validated against existing literature and show good agreement. The results indicate that the velocity profile rises with increasing squeezing and magnetic parameters in the mid‐region between the plates, while it decreases with the Sutterby fluid parameter. The applied magnetic field enhances the temperature field while attenuating the concentration profile. Additionally, the skin friction coefficient, temperature gradient, and local Sherwood number are evaluated numerically. Furthermore, entropy generation and the Bejan number decrease with higher magnetic and Brinkman parameters. These results provide useful insights for the design and optimization of thermal and biotechnological systems involving non‐Newtonian nanofluids.