No abstract

No abstract

No abstract

No abstract

In this paper, we investigate the stress distribution on a two phase problem in micro-extrusion. Molten polymer is compressed from a vessel and the extruded fluid is being solidified through the heat exchange with the solid polymer and the ambient environment resulting in a two phase/moving boundary problem. The temperature profile of such problem has analytically been determined and the present author, Chan further investigates the fluid flow of the molten polymer embedded inside the condensed outer-shell. In this paper, we investigate the stress distribution induced by the fluid flow, which is driven by the incoming fluid and the moving boundary. We find that when x’>>H (see Fig. 1), shear stress dominates whereas the principal stress dominates when x’<<H. When x’ approximates H, both the shear and principal stresses coexist.