Driven torsion pendulum for measuring the complex shear modulus in a steady shear flow

Henricus T.M. van den Ende, J. Mellema, C. Blom

Research output: Contribution to journalArticleAcademicpeer-review

11 Citations (Scopus)
75 Downloads (Pure)

Abstract

To investigate the viscoelastic behavior of fluid dispersions under steady shear flow conditions, an apparatus for parallel superimposed oscillations has been constructed which consists of a rotating cup containing the liquid under investigation in which a torsional pendulum is immersed. By measuring the resonance frequency and bandwidth of the resonator in both liquid and in air, the frequency and steady-shear-rate-dependent complex shear modulus can be obtained. By exchange of the resonator lumps it is possible to use the instrument at four different frequencies: 85, 284, 740, and 2440 Hz while the steady shear rate can be varied from 1 to 55 s−1. After treatment of the theoretical background, design, and measuring procedure, the calibration with a number of Newtonian liquids is described and the accuracy of the instrument is discussed.
Original languageUndefined
Pages (from-to)194-205
Number of pages12
JournalRheologica acta
Volume31
Issue number2
DOIs
Publication statusPublished - 1992

Keywords

  • IR-85731
  • nearly viscometric flow
  • METIS-129225
  • torsion pendulum
  • complex shear modulus
  • Superimposed oscillatory shear

Cite this