Pumping characteristics of self-wiping twin-screw extruders—A theoretical and experimental study on biopolymer extrusion |
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Authors: | R A Lai-Fook A Senouci A C Smith D P Isherwood |
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Abstract: | The flow of Newtonian and non-Newtonian fluids which obeys a power law relationship between shear stress and shear rate has been modeled in the melt conveying section of a self-wiping co-rotating twin-screw extruder using a finite element analysis of an unwound channel section. Predictions of throughput against pressure gradient are compared with experimentally obtained results for maize grits which is represented as a power law material. Rheological data applicable to extrusion simulation were obtained from capillary rheometry. Comparisons are reasonable with predicted characteristic showing similar behavior. |
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