Measure viscosity on-line with a helical barrel rheometer

David B. Todd, Costas G. Gogos, Mohamed Esseghir, Dong Woo Yu, Soemantri Widagdo

Research output: Contribution to conferencePaperpeer-review


A new versatile on-line rheometer has been developed for monitoring process viscosities. The principle of this rheometer is based upon measuring the pressure differential across one flight of a special extruder wherein the helix is cut in the barrel rather than in the screw. On-line data from the new rheometer agree well with off-line capillary rheometer data. The new rheometer can also handle fluids beyond the capabilities of conventional capillary or slit rheometers. The relationship of wall shear rate for closed Couette flow has been determined for power law fluids.

Original languageEnglish (US)
Number of pages5
StatePublished - 1996
Externally publishedYes
EventProceedings of the 1996 54th Annual Technical Conference. Part 2 (of 3) - Indianapolis, IN, USA
Duration: May 5 1996May 10 1996


OtherProceedings of the 1996 54th Annual Technical Conference. Part 2 (of 3)
CityIndianapolis, IN, USA

All Science Journal Classification (ASJC) codes

  • General Chemical Engineering
  • Polymers and Plastics


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