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

✍ Scribed by Werner Michael Kulicke; Roger S. Porter

• Publisher: John Wiley and Sons
• Year: 1979
• Tongue: English
• Weight: 771 KB
• Volume: 23
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/app.1979.070230401

✦ Synopsis

Flow irregularities have been visually observed in solutions of polyacrylamide of high molecular weight on shear in a cone-and-plate rheometry (gap angle 2.3O). This anomalous flow was found to depend on molecular weight, concentration, and solvent. The onset of flow irregularities were generally a t shear rates < 5 sec-'. 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.