Entropy Generation Analysis of Inclined MHD Hybrid Nanofluid Flow With Cattaneo–Christov Heat Flux Over a Solar‐Heated Curved Stretching Sheet

The conversion of solar radiation into thermal energy has attracted considerable interest because of the increasing worldwide need for renewable and sustainable energy sources. The remarkable heat transfer characteristics of nanofluids make them essential for improving solar‐thermal system efficiency. This is achieved through the use of copper (Cu) and silver (Ag) nanoparticles to produce a Casson hybrid nanofluid (HNF), which is suspended in a 50:50 (water + ethylene glycol) base fluid. The thermal performance of this fluid is then studied on a non‐Darcy porous curved stretching surface that is shown to an angled magnetic field. The methodology takes into account the combined effects of viscous dissipation, Forchheimer resistance, thermal radiation, heat source/sink, and Cattaneo–Christov heat flux. The governing nonlinear equations are simplified using similarity transformations and solved numerically using MATLAB's bvp4c solver. The findings demonstrate that augmenting magnetic field strength amplifies Lorentz forces, thereby decreasing fluid velocity and raising temperature owing to resistive heating. Increased nanoparticle concentration and curvature parameters markedly enhance heat transmission properties, whereas viscous dissipation elevates entropy production and diminishes the Bejan number, signifying more thermal irreversibility. The results provide an insightful understanding of the advancement and enhancement of HNF‐based solar thermal systems and curved sheet heat transfer in advanced energy applications.