Viscosity equation for polydisperse concentrated emulsions

In this paper the extension of our model (Krynke and Sęk 2004) for predicting viscosity of emulsions has been presented. It concerns highly concentrated polydisperse emulsions systems. Their structure is characterized by the fm values above 0.79. This present model has been verified using our own experimental results. On the basis of analyses of these data, it has been evaluated that z parameter of the model was a function of volume fraction of inner phase, the ratio of mean droplets diameters and the ratio of densities of disperse and continuous phases. So, the new equation was proposed for calculating z. Constants in the dependency have been calculated using multiple regression. After introducing the new equation for parameter z in the case of polydisperse emulsions with fm above 0.79, the satisfied agreement between predicted and experimental values of viscosity has been reached. The relative error was about š25%.