The prediction and measurement off the developing radial temperature profile in a single‐screw extruder is essential since excessive extrudate temperature and poor temperature uniformity at the die affect the quality of coextrusion and film/sheet extrusion processes. A finite‐difference scheme is used to predict the development of the radial temperature profile in the metering section of a single‐screw extruder for power‐law fluids. A finite‐element analysis of the flow around the screw‐tip transposes this temperature profile onto an on‐line temperature measuring device consisting of 10 thermocouples for a comparison of numerical results with experimental data on polycarbonates.
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Bruker et al. (1987) studied this question.
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