Some observations on the use of slit rheometry for characterizing the primary normal stress difference of extrudates

Robert Y. Ofoli, James F. Steffe

    Research output: Research - peer-reviewArticle

    • 4 Citations

    Abstract

    Experimental evidence is presented to demonstrate that the standard procedure of linearly extrapolating pressure profiles through the exit of slit rheometers as a means of characterizing extrudate elastic properties is inappropriate. This widely used procedure, based on the assumption that the pressure gradient is constant over the entire instrument, is erroneous because the flow does not remain fully developed through the exit of the rheometer.

    LanguageEnglish (US)
    Pages145-157
    Number of pages13
    JournalJournal of Food Engineering
    Volume18
    Issue number2
    DOIs
    StatePublished - 1993

    Profile

    rheometers
    rheometry
    Pressure

    ASJC Scopus subject areas

    • Food Science

    Cite this

    Some observations on the use of slit rheometry for characterizing the primary normal stress difference of extrudates. / Ofoli, Robert Y.; Steffe, James F.

    In: Journal of Food Engineering, Vol. 18, No. 2, 1993, p. 145-157.

    Research output: Research - peer-reviewArticle

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