Analytical Solutions for Unsteady Flow of a Fourth-Grade Fluid Arising in the Metallic Wire Coating Process Inside a Cylindrical Roll Die

摘要: The unsteady flow of a non-Newtonian fluid in metallic wire coating process inside cylindrical roll die is considered. constitutive equations the are modeled for fourth-grade with non-homogenous boundary conditions. Analytical solutions axial velocity field have been obtained explicit forms by modified homotopy perturbation transform method. These written as sum between permanent and transient solutions. However, large values t, both these become identical. compared existing exact solution same problem second grade fluid. Also, graphs representing discussed appropriate conclusions drawn.