A Comparative Study of Thin Film Flow of Fe3 O4 And Al2 O3 Nanoparticles over Stretching Surface Under the Effect of Viscous Dissipation and Magnetohydrodynamics(MHD)

Abstract

Abstract This article presents a numerical investigation of thin film flow and heat transfer for lamina, tetrahedron, and hexahedron-shaped nanomaterials of Fe3 O4 and Al2 O3 over a time-dependent radially vertical stretching surface. Moreover, the magnetohydrodynamics and viscous dissipation effects are also incorporated. A similarity transformation is employed to produce the nonlinear governing system of equations, which is numerically solved using the BVP4C method in MATLAB. The study shows that film thickness depends on the unsteadiness parameter, with an increase in the parameter causing decrease in film thickness (β), velocity, and temperature. The lamina and hexahedron shapes provide maximum and minimum film thickness for Fe3 O4 and Al2 O3 both nanoparticles, while the hexahedron and lamina shapes generate maximum and minimum skin friction. The Nusselt numbers exhibit the opposite effect. These findings provide insights into thin film flow's fundamental mechanisms and applications.