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On the theory of the dynamic viscometer

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Summary

It is shown that by using a dynamic viscometer, complex dynamic viscosities can be determined rather easily over a wide frequency range. Expansions of the exact solution which takes inertia effects into account are in the case of small gap widths almost identical for low and high frequencies. For intermediate frequencies the deviation from this limiting behavior is only a few percent.

Zusammenfassung

Die Anwendung von dynamischen Viskometern ermöglicht eine einfache Bestimmung von komplexen dynamischen Viskositäten über einen weiten Frequenzbereich. Reihenentwicklungen der exakten Lösung, welche Trägheitseffekte berücksichtigt, sind für den Fall enger Zylinder-Spalte für niedrige und hohe Frequenzen fast identisch. Aber auch bei Frequenzen im Zwischenbereich weichen die Ergebnisse nur um einige Prozent ab.

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Authors and Affiliations

  1. Pulp and Paper Research Institute, McGill University, Montreal, PQ, Canada

    T. G. M. van de Ven

  2. BHP Central Research Labs., 2307, Shortland, N.S.W., Australia

    B. A. Firth

  3. Department of Physical Chemistry, University of Sydney, Australia

    B. A. Firth

Authors
  1. T. G. M. van de Ven
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  2. B. A. Firth
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van de Ven, T.G.M., Firth, B.A. On the theory of the dynamic viscometer. Rheol Acta 17, 606–611 (1978). https://doi.org/10.1007/BF01522033

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  • DOI: https://doi.org/10.1007/BF01522033

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