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Modeling Flow in Cylindrical Extruder Dies
Author(s) -
KUMAR ASHWINI,
BHATTACHARYA M.,
PADMANABHAN MAHESH
Publication year - 1989
Publication title -
journal of food science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.772
H-Index - 150
eISSN - 1750-3841
pISSN - 0022-1147
DOI - 10.1111/j.1365-2621.1989.tb05165.x
Subject(s) - die (integrated circuit) , plastics extrusion , barrel (horology) , materials science , pressure drop , isothermal process , composite material , volumetric flow rate , flow (mathematics) , mechanics , thermodynamics , nanotechnology , physics
Volumetric flowrate was studied in the die of a single screw extruder. Variables included the ratio of die length to die diameter, barrel to die diameter, barrel and die temperature, screw speed and product moisture. Die conductance was determined graphically and analytically. Results indicated that for a constant pressure drop across the die, increasing temperature, die diameter or moisture increased flowrate. Dimensional analysis was used to study the effect of each parameter on the flow through the extruder die. An expression for temperature rise due to viscous dissipation for isothermal flow in the die was developed and nomographs are presented.