Influence of shear rate, concentration and temperature on viscosity of polyacrylamide dispersions

A non-Newtonian fluid has a viscosity that changes with the applied shear rate. Moreover, viscosity depends on temperature and concentration. This study proposes a model to describe the polyacrylamide dispersion viscosity dependence on these variables. A programmable rheometer was used to analyze th...

Full description

Saved in:
Bibliographic Details
Published inTecnologia em Metalurgia, Materiais e Mineracao Vol. 20100726; pp. 1560 - 1569
Main Authors Aguiar, Amaury De Azevedo, Da Silva, Ivonete Pereira Gonzalez, De Melo, Maria Aparecida, Da Costa, Andre Luiz Hemerly
Format Journal Article
LanguageEnglish
Published 01.01.2010
Subjects
Computer simulation
Consistency
Dispersions
Federations
Mathematical models
Polyacrylamides
Shear rate
Viscosity
Online AccessGet full text

Cover

More Information
Summary:A non-Newtonian fluid has a viscosity that changes with the applied shear rate. Moreover, viscosity depends on temperature and concentration. This study proposes a model to describe the polyacrylamide dispersion viscosity dependence on these variables. A programmable rheometer was used to analyze the influence of a range of shear rates and temperatures on the dispersion viscosity of different concentrations of polyacrylamide dispersions. The Power-law model was applied to the results and the consistency and behavior indexes were obtained for each condition. The relationship of both these indexes with temperature and concentration was modeled and the parameters were entered in the Power-law model. The achieved correlation can be applied to simulation processes where transient conditions affect the dispersion viscosity as well as to forecast the viscosity in a preassessment. Another achieved result is the drastic reduction of the measurements required for material characterization.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
content type line 23
ObjectType-Conference-3
SourceType-Conference Papers & Proceedings-2
ObjectType-Feature-1
ISSN:2176-1515