A rotating sphere viscometer

Kelkar, J. V. ; Mashelkar, R. A. ; Ulbrecht, J. (1973) A rotating sphere viscometer Journal of Applied Polymer Science, 17 (10). pp. 3069-3083. ISSN 0021-8995

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Official URL: http://onlinelibrary.wiley.com/doi/10.1002/app.197...

Related URL: http://dx.doi.org/10.1002/app.1973.070171013


The use of a rotating sphere viscometer for the measurement of parameters in the flow curves of inelastic as well as viscoelastic liquids is examined. An experimental investigation of the primary flow around a sphere rotating in Newtonian and viscoelastic liquids is carried out by using a new "three-dimensional particle technique." Currently available theoretical analyses of rotation of a sphere in viscoelastic liquids are shown to be inadequate to describe the experimental primary velocity distribution data. Theoretical results for the primary distribution derived on the basis of a creeping flow of a power law liquid are found to describe the experimental data well. This distribution is then used to derive torque-angular velocity relationships, which are then confirmed experimentally for both inelastic and viscoelastic liquids. The results of this work justify the use of a rotating sphere viscometer as a useful tool for the measurement of parameters of flow curves of inelastic and viscoelastic liquids.

Item Type:Article
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ID Code:22166
Deposited On:23 Nov 2010 08:10
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