Application of Hildebrand's fluidity model to non-Newtonian solutions

T. Sridhar, R. P. Chhabra, P. H.T. Uhlherr, O. E. Potter

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The fluidity model of Hildebrand has been applied to dilute aqueous polymer solutions exhibiting non-Newtonian behaviour. As for Newtonian fluids, it is found that the temperature dependence of apparent viscosity of non-Newtonian fluids is determined entirely by the temperature dependence of fluid density. However, whereas the parameters of Hildebrand's equation are constants, independent of the conditions of shear for Newtonian fluids, these parameters become shear-rate dependent for non-Newtonian fluids. The magnitude of the parameters and their variation with shear rate can be explained qualitatively in terms of interactions of polymer molecules and their behaviour in a shear field.

Original languageEnglish
Pages (from-to)519-524
Number of pages6
JournalRheologica Acta
Issue number5
Publication statusPublished - 1 Sept 1978

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