Concentration Dependency of the Rheological Behaviour of Oil-Water Emulsions


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Abstract


The evolution of viscosity with the oil concentration was measured in a rotating cylinder viscosimeter. The measurements were performed for an oil emulsion used for lubrication of drilling and cutting tools and for crude oil emulsions. At low concentrations the rheological behaviour of the lubricant emulsion is weakly Binghamian. At higher concentrations a power law model was used to fit the data. For both emulsions a peak of viscosity was observed for an concentration ranging between 70 and 80 vol%. The results have also show that a Richardson like exponential model of the viscosity evolution with concentration is only valid for high shear rates and concentrations close to the critical concentration corresponding to the peak of viscosity.
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Keywords


Concentration; Crude Oil Emulsion; Cutting Oil Emulsion; Peak of Viscosité; Rheological Behavior

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References


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