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Evaluation of a helical ribbon impeller as a viscosity measuring device for fluid foods with particles

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Author

Summary, in English

The traditional methods of measuring viscosity with rotational viscometers, i.e. cone-plate and concentric cylinder systems, are often not suitable for suspensions. To be able to measure viscosity on suspensions mixer viscometers have been developed. In this study a new design of a helical ribbon impeller has been evaluated and the Metzner-Otto approach has been used to calibrate the impeller. Different kinds of food products were studied. The Metzner-Otto parameter obtained from tomato products was lower than those obtained from starch products. The study showed that the Metzner-Otto parameter varied but seemed rather to be dependent on the composition of the food material than on the flow behaviour index. The impeller could handle high concentration of quite large particles. This type of helical ribbon impeller viscometer is thus recommended for rheological studies of suspensions with high concentration of particles.

Department/s

Publishing year

2002

Language

English

Pages

303-308

Publication/Series

Applied Rheology

Volume

12

Document type

Journal article

Publisher

De Gruyter

Topic

  • Chemical Engineering
  • Food Engineering

Status

Published

ISBN/ISSN/Other

  • ISSN: 1430-6395