Abstract
BROOKFIELD VISCOMETER: A DETERMINATION OF VISCOSITY

Jalaj Nishad*, Vinita Singh, Chandraprabha Dewangan and Madhu Sahu

ABSTRACT

This paper analyzes various techniques to use viscometers equipped with vane spindles to characterize rheological properties of yield stress fluids. Specifically, an application of Brookfield viscometer to this end is discussed. A wide selection of toothpaste and lotions were tasted. It is shown that a simple method based on apparent shear rate and stress, commonly referred to as a representative viscosity method, works well for moderately non-Newtonian samples but may significantly underestimate viscosity for sample with more pronounced yield stress behavior.

Keywords: Yield stress, vane, Brookfield viscometer, toothpaste.


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