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Residence time distribution in non‐intermeshing counter‐rotating twin‐screw extruders
Author(s) -
Chen L.,
Hu G. H.,
Lindt J. T.
Publication year - 1995
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.760350706
Subject(s) - residence time distribution , superposition principle , residence time (fluid dynamics) , consistency (knowledge bases) , materials science , mechanics , distribution (mathematics) , plastics extrusion , flow (mathematics) , tracer , mechanical engineering , mathematics , geometry , engineering , composite material , physics , mathematical analysis , geotechnical engineering , nuclear physics
This paper deals with the residence time distribution (RTD) in a non‐intermeshing counter rotating twin screw extruder. The RTDs were measured in three vent zones of the extruder sparately, and in the adjacent zones combined, using a soluble dye as the tracer. Assuming that the RTDs in the adjacent zones are independent of each other, the overall RTD was also calculated using a previously developed statistical theory. The theory has also confirmed the consistency of the present measurements. A predictive RTD model for the non‐intermeshing twin screw extruder, based on the flow analysis of the individual screw zones and their statistical superposition, was also developed. The predictions are in good agreement with experiment.