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The mixer viscometer constant (k1) of a Brookfield viscometer equipped with a flag impeller and small sample adapter was determined using the slope and matching viscosity methods. Results showed that k’ was equal to a constant value of 2.92 rad−1 using the slope method and found to be a function of angular velocity (Ω), k’= 2.54(Ω)−0.176, using the matching viscosity method. An example problem illustrating how the mixer viscometry principle can be used to determine the relationship between apparent viscosity and average shear rate is presented.
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Briggs et al. (1996) studied this question.
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