Zdrojový dokument:Scientific papers of the University of Pardubice. Series A, Faculty of Chemical Technology. 25/2019
ISSN:1211-5541
Abstrakt:
The paper deals with the determination of the terminal velocity of solid spherical
particles falling slowly in unbounded purely viscous shear-thinning polymer solutions.
The relationships are given for calculation of a sphere terminal velocity falling in the
creeping flow region using a power-law viscosity model. The comparison is presented
for terminal velocities calculated according to the aforementioned relationships with
those obtained experimentally by measuring the terminal velocity of spheres in the
aqueous solutions of polymers. By considering the shape of the viscosity function of the
polymer solutions, it was necessary to use a simple iterative method to estimate the
suitable interval of shear rates for determination of the power-law model parameters.