On leave from Institut für Chemische Technologie, Technische Universität Braunschweig, Federal Republic of Germany.
Irregularities in steady flow for non-newtonian fluids between cone and plate
Article first published online: 9 MAR 2003
Copyright © 1979 John Wiley & Sons, Inc.
Journal of Applied Polymer Science
Volume 23, Issue 4, pages 953–965, 15 February 1979
How to Cite
Kulicke, W. M. and Porter, R. S. (1979), Irregularities in steady flow for non-newtonian fluids between cone and plate. J. Appl. Polym. Sci., 23: 953–965. doi: 10.1002/app.1979.070230401
- Issue published online: 9 MAR 2003
- Article first published online: 9 MAR 2003
- Manuscript Revised: 15 NOV 1977
- Manuscript Received: 25 JUL 1977
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.