Irregularities in steady flow for non‐newtonian fluids between cone and plate | Zendy

Kulicke Werner Michael | Zendy; Porter Roger S. | Zendy

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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.

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