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Analysis of closed‐discharge single‐screw extrusion of power‐law fluids
Author(s) -
Guzmán Job D.,
Schieber Jay D.
Publication year - 2003
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.10004
Subject(s) - rheometry , extrusion , materials science , power law fluid , rotation (mathematics) , power law , mechanics , rheology , metering mode , plastics extrusion , power (physics) , mechanical engineering , composite material , thermodynamics , geometry , mathematics , non newtonian fluid , physics , engineering , statistics
Abstract For rheometry and polymer processing applications, it is important to correlate fluid material properties with extrusion parameters like pressure buildup and revolutions per minute. Previous attempts to obtain such correlations have resorted to numerical techniques or approximate relationships. Here we show that upon a suitable rotation of coordinate axes, analysis of the metering zone in closed‐discharge single‐screw extrusion is simplified. Taking advantage of such simplification, we have derived an analytic, self‐consistent relation between fluid properties and extrusion parameters, where the power‐law model is used throughout the analysis.