Entropy Analysis of Electro‐Osmotic Bingham Fluid Flow Through Oblique Rough Channel With Variable Thermal Properties

One of the critical aspects of peristaltic transport is analyzing the influence of surface roughness on fluid motion. Rough surfaces promote heat transfer since they disturb the boundary layer, unlike smooth channels. With this perspective, the current work considers the electro‐osmotic peristaltic flow of Bingham fluid in a rough channel, along with the effects of temperature‐dependent properties. The fluid motion is modeled using lubrication theory approximations in order to guarantee the accurate description of low Reynolds number and long‐wavelength assumptions. The influence of slip and convective boundary conditions, heat source coefficient, and Helmholtz–Smoluchowski velocity on flow dynamics is examined. The nonlinear transformed equations are solved using OHAM to render computations efficient and accurate. Graphical analysis shows the effect of various parameters on velocity, temperature, entropy generation, wall shear stress, and Nusselt number. Results indicate that a hike in yield stress diminishes temperature and entropy generation, while higher roughness factors enhance fluid flow in the center and drop at the walls of the channel. Further, the role of thermal conductivity in temperature to regulate heat exchange efficiency is most dominant. These results are important to optimize the performance of peristaltic transport systems within microfluidics, industrial fluids, and heat exchange applications.