EVALUATING SHEAR RATES FOR POWER LAW FLUIDS IN MIXER VISCOMETRY Academic Article uri icon

abstract

  • Established mixer viscometry methods, the viscosity matching and the slope methods, were evaluated for determining average shear rates when agitating timeindependent, nonNewtonian fluids. Results indicate that the use of a constant value of the mixer proportionally constant, k', is not valid for all ranges of fluid rheological properties, system geometry (impeller and cup) and impeller rotational speed. A small impellertocup diameter ratio and impeller rotational speeds greater than .33 rev/s (20 rpm) provide the optimum operating parameters for evaluation of k'. Copyright 1990, Wiley Blackwell. All rights reserved

published proceedings

  • Journal of Texture Studies

author list (cited authors)

  • CASTELLPEREZ, M. E., & STEFFE, J. F.

citation count

  • 29

complete list of authors

  • CASTELLā€PEREZ, M ELENA||STEFFE, JAMES F

publication date

  • January 1, 1990 11:11 AM

publisher