OSCILLATING VANE GEOMETRY FOR SOFT SOLID GELS AND FOAMS
SERVAIS, C. ; RAVJI, S. ; SANSONNENS, C. ; BAUWENS, I.
Oxford, UK : Blackwell Publishing Ltd
Published 2002
Oxford, UK : Blackwell Publishing Ltd
Published 2002
| ISSN: |
1745-4603
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|---|---|
| Source: |
Blackwell Publishing Journal Backfiles 1879-2005
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| Topics: |
Process Engineering, Biotechnology, Nutrition Technology
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| Notes: |
Several relationships between the torque and the stress exist for the vane geometry, but only a few equations have been proposed for the relationship between angular displacement and strain. In this study, an expression based on the infinite gap approximation for concentric cylinders is used and well-defined reference data are compared to oscillating vane data to validate the assumptions used. Gelatin gels are used for their property to stick to the wall and carrageenan gels are used to show that wall slip does not occur with oscillating vanes in serrated cup geometries. Shaving foams are used as a model low density, time and shear stable foam, which resists irreversible damage when loaded between serrated parallel plates. Results show that the assumptions used for the determination of stress and strain with the vane provide material viscoelastic properties that are not significantly different from reference values as obtained with concentric cylinders and parallel plates.
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| Type of Medium: |
Electronic Resource
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| URL: |