Abstract
In this paper, analysis of post-treatment of wire coating is presented. Coating material satisfies power law fluid model. Exact solutions for the velocity field, volume flow rate and average velocity are obtained. Moreover, the heat transfer results are presented for different cases of linearly varying on the boundaries. The variations of velocity, volume flow rate, radius of coated wire, shear rate and the force on the total wire are presented graphically and discussed.
Highlights
The wire coating process is basically an extrusion operation in which either the molten polymer, in the form of tubing, is extruded continuously over axially moving wire, or the wire is pulled through the extruded molten polymer
Polymer extrudate is an important industrial process used for coating a wire for primary insulation of conducting wires with molten polymers for mechanical strength and environmental protection purposes
The basic concept of modeling the wire coating for viscous fluid is given in the books by Denn and middleman [1,2]
Summary
The wire coating process is basically an extrusion operation in which either the molten polymer, in the form of tubing, is extruded continuously over axially moving wire, or the wire is pulled through the extruded molten polymer. McKelvey [3] and Paton et al [4] have analyzed the flow of Newtonian and power law fluid model in wire coating process, and obtained expressions for the flow rate, shear rate and the velocity distribution along the radial direction. Fenner and Williams [9] carried out an analysis of the flow in the tapering section of a pressure type die. They obtained the numerical solutions for the pressure and velocity profiles in the die. M. Sajjid et al [10] studied the wire coating with Oldroyd 8-constant fluid and gave the solution for velocity field in the series form.
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