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

摘要

AbstractFlow 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