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    Author(s): Joseph R. Samaniuk; Timothy W. Shay; Thatcher W. Root; Daniel J. Klingenberg; C. Tim Scott
    Date: 2014
    Source: AIChE Journal, April 2014. Volume 60, Number 4, 2014; pp. 1523-1528.
    Publication Series: Scientific Journal (JRNL)
    Station: Forest Products Laboratory
    PDF: View PDF  (327.33 KB)


    An inexpensive, rapid method for measuring the rheological properties of yield stress fluids is described and tested. The method uses an auger that does not rotate during measurements, and avoids material and instrument-related difficulties, for example, wall slip and the presence of large particles, associated with yield stress fluids. The method can be used for many types of yield stress fluids, including concentrated lignocellulosic biomass. Sample preparation prior to measurement is minimal, reducing, or eliminating disruption of the sample. We show that measurements using this technique compare well with measurements obtained with a vane rheometer. A variation of the described method is proposed that would make it easier to measure time-dependent rheological properties.

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    Samaniuk, Joseph R.; Shay, Timothy W.; Root, Thatcher W.; Klingenberg, Daniel J.; Scott, C. Tim. 2014. A novel rheometer design for yield stress fluids. AIChE Journal, April 2014. Volume 60, Number 4, 2014; pp. 1523-1528.


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    rheometer, rheology, auger, yield stress, lignocellulosic biomass

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