RHEOLOGICAL PROPERTIES AND FLOW OF CONCENTRATED DISPERSE MEDIA I - MODELLING OF STEADY AND UNSTEADY BEHAVIOR |
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| Authors: | D. QUEMADA P. FLAUD P.H. JEZEQUEL |
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| Affiliation: | Laboratoire de Biorhéologie et d'Hydrodynamique PhysicoChimique(°) , Université Paris VII , Paris, Cédex05, 75221, France. |
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| Abstract: | Abstract A steady viscosity model, including both volume fraction and shear rate variables, is shown to be applicable to a large class of complex liquids which can be considered as highly concentrated disperse media. The effect of yield stress is taken into account. For unsteady measurements, this model, which includes thixotropy, can be simply extended to viscoelastic behaviour. Some examples of application will be given, specially to heavy crude oil emulsions. |
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| Keywords: | Concentrated dispersions Rheological modelling Shear-thinning Shear-thickening Thixotropy Visco-elasticity |
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