Premium
Irregularities in steady flow for non‐newtonian fluids between cone and plate
Author(s) -
Kulicke Werner Michael,
Porter Roger S.
Publication year - 1979
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1979.070230401
Subject(s) - rheometry , newtonian fluid , flow (mathematics) , rheology , shear flow , mechanics , materials science , shear (geology) , shear stress , non newtonian fluid , shear rate , generalized newtonian fluid , physics , composite material
Flow irregularities have been visually observed in solutions of polyacrylamide of high molecular weight on shear in a cone‐and‐plate rheometry (gap angle 2.3°). This anomalous flow was found to depend on molecular weight, concentration, and solvent. The onset of flow irregularities were generally at shear rates < 5 sec −1 . A dimensional analysis shows that the elastic component of the fluid is responsible for the anomalous flow. The onset of flow irregularities has been predicted from measurements of recoverable strain as a function of shear stress.