Abstract
AbstractIt is shown how previous analyses of the falling cylinder viscometer for Newtonian fluids can be extended to non‐Newtonian fluids. Specific relations are given for the velocity of descent for several simple non‐Newtonian viscosity functions. A differentiation procedure is presented whereby the non‐Newtonian viscosity for a fluid can be deduced from velocity of fall measurements. In the course of the development, some useful approximate expressions for axial non‐Newtonian flow in annuli are developed. Finally, a comparison of the Ellis and power law models is made by an analysis of the axial annular flow data of Frederickson and of McEachern.
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