IMPACT OF NANOPARTICLE SHAPES AND THERMODYNAMICS ON MHD ALUMINA-WATER THIN FILM FLOW OVER AN INCLINED POROUS SURFACE

This study investigates the unsteady thin film fluid dynamics and heat transfer features of nanofluid comprising Al<sub>2</sub>O<sub>3</sub> nanoparticles dispersed in a base fluid along a stretching sheet enclosed within a porous medium. The model incorporates effects of radiation, Ohmic heating, electromagnetohydrodynamic (EMHD), and viscous dissipation. The impact of different nanoparticle shapes is also analyzed. The governing partial differential equations are transitioned into ordinary differential equations by means of similarity transformations and computed using coupled fourth-order Runge-Kutta integration and shooting process. The variations in velocity and temperature trends are presented visually for key factors by executing the code in MATLAB. Skin friction and thermal flow rate on the surface are also tabulated. The results indicate velocity deceleration with increasing magnetic field and porosity parameters. The electric field enhances the temperature, but the velocity slip reduces it. Platelet-shaped nanoparticles prove most effective in augmenting heat transfer compared to other shapes. The findings have practical implications for thermal management systems, enhanced oil recovery, and magnetohydrodynamic (MHD) fluid transport. The current solutions compare well with literature reports. The study offers key perspectives on the transport behavior of nanofluids within porous substrate, with relevance to practical applications.