RECENT UPDATES

When Lubricants Fail to Flow - The Gelation Phenomenon

Ted Selby

The teleseminar with Ted Selby focuses on his experiences with the phenomenon of gelation or semi-solidification of lubricants and ...read more

Kinematic or Dynamic: Which Viscosity Method Should You Use?

Ken Henderson Interview

The viscosity world has practitioners that use two different approaches for measuring fluid flow behavior. Kinematic viscosity ...read more

CUSTOMER CHALLENGE: Viscosity measurement for non-Newtonian solutions

I would like to know if there is a way to give one single viscosity measurement for a non-Newtonian solution (ie. this solution has a viscosity of this) without constraining it a specific shear rate. I was thinking of using the coefficient of thixotrophy (slope of the viscosity-1 verse rate of shear graph) but don't know if there is a better or easier way.

BROOKFIELD ANSWERS: There isn't one "universal" measurement that can be used to describe a particular non-Newtonian material's rheology, to the best of my knowledge. However, ...read more

CUSTOMER CHALLENGE: Fluid Rheology

"How Can I Understand the Rheology of a Fluid?"

BROOKFIELD ANSWERS:

The preferred method used by Brookfield to understand the rheology of a fluid is to perform an up-down speed or shear rate ramp with ...read more

CUSTOMER CHALLENGE: Storage Stability

"How can I evaluate storage stability?"

BROOKFIELD ANSWERS: Storage stability can be evaluated by testing retained samples periodically using an up-down speed or shear rate ramp. The test data provides a "flow ...read more