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BACK EXTRUSION OF POWER LAW FLUIDS 1
Author(s) -
OSORIO FERNANDO A.,
STEFFE JAMES F.
Publication year - 1987
Publication title -
journal of texture studies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.593
H-Index - 54
eISSN - 1745-4603
pISSN - 0022-4901
DOI - 10.1111/j.1745-4603.1987.tb00569.x
Subject(s) - extrusion , rheology , plunger , viscometer , materials science , dimensionless quantity , power law , shear rate , mechanics , cylinder , power law fluid , composite material , mechanical engineering , non newtonian fluid , engineering , mathematics , viscosity , physics , statistics
A mathematical model, using dimensionless terms, was developed to describe the behavior of power law fluids in a back extrusion (annular pumping) device. A graph and a table were prepared to determine rheological properties from experimental data. Expressions to calculate shear stress and shear rate at the plunger wall were obtained. The model was experimentally validated by comparing values obtained with the back extrusion device to those obtained with a concentric cylinder viscometer.