Impacts of nanoparticle shapes on Ag-water nanofluid thin film flow through a porous medium with thermal radiation and ohmic heating

Our present study intends to examine the unsteady thin film flow and heat transfer of Ag - H 2 O nanofluid on a stretching sheet embedded in a porous medium. Radiative heat, Ohmic heating with slip, and convective boundary conditions are taken into account. The effect of various nanoparticle shape factors is also investigated. Nanofluid thermal conductivity depends on nanoparticle shape. The primary time-dependent equations are transformed using similarity transformation and solved using a prominent Runge–Kutta fourth-order and shooting iterative process. Graphs and numerical values of physical factors pertinent to fluid flow are obtained using MATLAB software. The skin friction coefficient and the heat transfer rate are also investigated and tabulated. Results reveal that magnetic, porosity, and unsteady parameters all have a diminishing impact on velocity profiles. Radiation parameter has a positive impact on temperature distribution, while an opposite trend is observed for magnetic fields. Findings indicate that magnetic field and porosity enhance the skin friction coefficient, whereas heat transfer rate increases with Biot number and slip parameter. Platelet-shaped nanoparticles are shown to be the most efficient in heat transfer. The outcomes were compared to previously reported results and found excellent agreement.