Abstract
In the melting of high-polymer material on industrial applications, there are unsteady flow phenomena on its non-Newtonian properties. In the difficulty and lack of the experimental investigation, the unsteady interface phenomena in melt-front of high-polymer materials (PP) with several flow configurations (rectangular flow with 5mm & 1mm thickness, with/without artificial surface control) are shown as local and unsteady geographic shape of gas-liquid interface experimentally with the visualization images of high-speed CCD video. From experimental results and considerations, the gas-liquid interface changes its shape properties time-dependently, and the two-way transitions of phenomena are detected, which mean that one is from the center to wall (fountain-flow-like), another is from near-wall to center by non-uniform slipping phenomena just near-wall. These results could be made needful of building the flow and heat transfer three-dimensional mechanism models of high-polymer material flow in ejecting by rectangular flow system.
