Viscosity equation for polydisperse concentrated emulsions

• Autorzy: Sęk J. , Krynke K.
• Konferencja: Third International Conference on Engineering Rheology, ICER 2005
• Języki publikacji: EN

Abstrakty

EN

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%.

Słowa kluczowe

EN

viscosity; emulsions; polydispersity

PL

reologia; lepkość; polidyspersyjność; emulsja

• Wydawca: Oficyna Wydawnicza Uniwersytetu Zielonogórskiego
• Czasopismo: International Journal of Applied Mechanics and Engineering
• Rocznik: 2005
• Tom: Vol. 10, no spec
• Strony: 329--334
• Opis fizyczny: Bibliogr. 5 poz., tab., wykr.

Twórcy

autor

Sęk J.

• Faculty of Process and Environmental Engineering Technical University of Łódź, POLAND

autor

Krynke K.

• Faculty of Process and Environmental Engineering Technical University of Łódź, POLAND

Bibliografia

• [1] Kembłowski Z., Sęk J. and Krynke K. (2003): Model making possible an expectation of viscous propertits of concentrated emulsions (in Polish). - Inż. i Ap. Chem., vol.3, pp.88-89.
• [2] Krynke K.K. and Sęk J.P. (2004): Predicting viscosity of emulsions in the broad rangę of inner phase concentratiotl - Coli. and Surfaces A, vol.245, pp.81-92.
• [3] Otsubo Y. and Prud’homme R.K. (1994): Rheology of oil-in-water emulsions. - Rheol. Acta, vol.33, pp.29-37.
• [4] Ouchiyama N. and Tanaka T. (1984): Estimation of the average number of contacts between randomly mixed solid particles. - Ind. Eng. Chem. Fundam., vol.23, pp.490-493.
• [5] Pal R. (1998): A novel method to correlate emulsion viscosity data. - Coli. and Surfaces A, vol.l37, pp.275-286.