A Numerical Study on Wire Coating Analysis in MHD Flow of an Oldroyd 8-Constant Fluid

Wire coating process is an industrial process to coat a wire for insulation, mechanical strength and environmental safety. The ever increasing applications in the industrial process are the cause of great interest in the study of viscoelastic flow in the wire coating process in a pressure type die. In the present study we provide a numerical solution of the Navier-Stokes equation for wire coating in a pressure type die using a bath of Oldroyd 8-constant fluid under constant pressure gradient in the axial direction. The novelty of this study is to analyze the effect of radial magnetic field on the wire coating. The governing differential equations characterizing the flow are solved numerically and the effects of emerging parameters such as dilatant parameter ( )  , pseudo-plastic parameter ( )  and viscosity parameter ( )  are discussed with the help of graphs. It is interesting to note that an increase in pseudo-plastic parameter accelerates the velocity in the absence of magnetic field. However, the presence of magnetic field slows down velocity of the coating fluid in the entire span of flow domain which is an important design requirement.