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Transient rheology in a new type of Couette apparatus.

I. Theoretical study with Newtonian fluids

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Summary

Calculations are performed which concern a new type of air-bearing viscometer. The transient motions of the rotor are studied for Newtonian fluids, and some applications are described for non-Newtonian fluids. It is shown that the rise and relaxation motions may be generally well described by only one exponential function of the time.

Zusammenfassung

Es werden Rechnungen betreffend ein luftgelagertes Viskosimeter neuen Typs durchgeführt. Die nichtstationären Bewegungen des Rotors werden zuerst für newtonsche Flüssigkeiten untersucht, anschließend folgt eine Anwendung auf nicht-newtonsche Flüssigkeiten. Es wird gezeigt, daß sowohl die Anlauf- als auch die Relaxationsbewegung im allgemeinen hinreichend gut durch eine einzige Exponentialfunktion beschrieben werden kann.

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References

  1. Hladik, J., La transformation de Laplace, Masson et Cie (1969).

  2. Lucius, M., C. R. Acad. Sci. Paris268, 1210–1213 (1969).

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  3. Astarita, G., G. Marruci, Principles of non-newtonian fluid mechanics, McGraw-Hill Book Co (UK) (1974).

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Authors and Affiliations

  1. Laboratoire de Biophysique Moléculaire E.R.A. N° 828 CNRS, Université de Nancy I Centre 1er cycle, C.O. N° 140, F-54037, Nancy Cedex, France

    J. C. Ravey

  2. Laboratoire d'Energétique et de Mécanique Théorique et Appliquée E.R.A. N° 595 CNRS, Institut National Polytechnique de Lorraine, B.P. 850, F-54011, Nancy Cedex, France

    M. Dognon & M. Lucius

Authors
  1. J. C. Ravey
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  2. M. Dognon
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  3. M. Lucius
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With 10 figures and 1 table

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Ravey, J.C., Dognon, M. & Lucius, M. Transient rheology in a new type of Couette apparatus.. Rheol Acta 19, 51–59 (1980). https://doi.org/10.1007/BF01523854

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  • DOI: https://doi.org/10.1007/BF01523854

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