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: Contribution to journalArticle

  • 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

Pressure
rheometers
rheometry

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: Contribution to journalArticle

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