Errors in parallel-plate and cone-plate rheometer measurements due to sample underfill

Leoh O. Hellström, Mohameda Samaha, Karenm Wang, Alexanderj Smits, Marcus Hultmark

Research output: Contribution to journalArticle

14 Scopus citations

Abstract

The effect of sample underfill on parallel-plate and cone-plate rheometers is examined. Sample underfill can be caused by incomplete filling of a sample or loss of fluid during a test by, for example, evaporation. It is shown that even a small degree of sample underfill can lead to significant errors in measuring viscosity. A method is proposed to reduce these errors by directly monitoring the sample radius over the full course of the test. It is shown that the accuracy of the rheometer even while testing simple fluids like water is greatly improved.

Original languageEnglish (US)
Article number015301
JournalMeasurement Science and Technology
Volume26
Issue number1
DOIs
StatePublished - Jan 1 2015

All Science Journal Classification (ASJC) codes

  • Instrumentation
  • Engineering (miscellaneous)
  • Applied Mathematics

Keywords

  • evaporation
  • rheometer
  • sample underfill

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