Modeling the pressure decay curve of a capillary rheometer

Russ Warley

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


A mathematical model for the transient pressure response in a capillary rheometer is implemented and validated with experimental data for both a natural rubber compound and a silicone rubber compound. The pressure decay curve after the cessation of motion of the instrument piston is shown to be consistent with the extrapolation of the power law model to shear rates two decades lower than experimentally attainable in the instrument employed. The model is useful for extending the range of the instrument in question by approximating material properties at shear rates lower than attainable in a steady flow experiment.

Original languageEnglish (US)
Pages (from-to)8-13
Number of pages6
JournalApplied Rheology
Issue number1
StatePublished - 2003

All Science Journal Classification (ASJC) codes

  • General Materials Science
  • Condensed Matter Physics


Dive into the research topics of 'Modeling the pressure decay curve of a capillary rheometer'. Together they form a unique fingerprint.

Cite this