Study of thermal radiation and dissipation effects on MHD Prandtl hybrid nanofluid flow past an exponential stretched porous device

Fluid dynamics requires a comprehensive understanding of energy dissipation, heat and mass transfer phenomena, since it directly impacts thermal efficiency, flow stability, and energy conservation in various industrial and engineering applications. With this motivation, the present study investigates the magnetized flow of Prandtl mixed hybrid nanofluids across an exponentially stretched surface. The hybrid nanofluid is formed with nanoparticles of Titanium oxide (TiO₂) and Copper (Cu) in water as the base fluid. The governing set of equations is formulated as an extension of the Prandtl fluid model to investigate the physical effects of chemical processes, heat radiation, bioconvection, and energy dissipation. The nonlinear ordinary differential equations are derived after successfully implementing appropriate transformations on governing equations and are solved numerically via the Differential Transform Method (DTM). The graphical illustration of non-dimensional velocity, temperature, and concentration is obtained through MATLAB and discussed with proper physical justification for various terms such as magnetic parameter, chemical reaction, radiation parameter, Sherwood number, Nusselt number, and friction parameter. The outcomes are validated with a comparison of previous published work. Results reveal that hybrid nanofluids significantly enhance heat transfer efficiency compared to conventional nanofluids. Increasing the Eckert and Biot numbers raises temperature, while a stronger magnetic field reduces fluid velocity. Increasing magnetic parameter reduces velocity by 42 % (NF) and 37.5 % (HNF), while increasing Eckert number raises temperature by 67 % (NF) and 53 % (HNF), highlighting strong magnetic and viscous dissipation effects. The findings of this study have significant applications in oil extraction, heat exchanger optimization, and MHD propulsion systems, where energy dissipation and thermal radiation play a crucial role.