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Anticipating Viscous Behavior at Lower Temperatures

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Ted Selby has collected interesting experience in over 50 years in the field of fuels and lubricants - particularly the latter. In the process of helping industry solve problems in the area of viscometric and other phenomena, he and his associates have developed several viscometric approaches and related instruments to understand and resolve those problems....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

Automotive Coatings

Dr. Clifford Schoff Interview

Brookfield interviewed Dr. Clifford Schoff on November 11th 2008. Dr.Schoff retired from the Automotive Coatings Department of ...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