Meyer Robert Rosen

Characterization of Non-Newtonian Flow

Abstract This paper presents a survey of mathematical methods for describing complex flow behavior with a minimum number of useful parameters. The use of these techniques allows rheological measurements to be employed as an effective tool for characterizing a broad range of industrial fluids. The discussion also describes several of the more common viscometers and presents useful computer programs for these.

A rheogram template for power law fluids: Technique for characterizing the rheological properties of emulsions and polymer solutions

Abstract A simple “template” method is presented which extends the usefulness of the Brookfield Synchro-Lectric viscometer, with the use of a cylindrical spindle, to meaningful characterization of non-Newtonian fluids which follow the power law. Deviation from Newtonian behavior is characterized by a single constant called the shear thinning index (STI). By the method, a well-defined shear rate can be determined for each rpm setting and corresponding apparent viscosity values can be simply and rapidly obtained. The technique has wide application for the study and characterization of emulsions and polymer solutions. It has recently been employed for determination of agglomerate—creaming tendency in silicone emulsions and in the quality control of Polyox®, poly(ethylene oxide) resins.