Shear Stability of Highly Concentrated Emulsions
- Authors: Masalova I.1, Kapiamba F.1, Tshilumbu N.1, Malkin A.Y.2
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Affiliations:
- Flow Process and Rheology Centre, Engineering Faculty
- Topchiev Institute of Petrochemical Synthesis
- Issue: Vol 80, No 1 (2018)
- Pages: 54-58
- Section: Article
- URL: https://journal-vniispk.ru/1061-933X/article/view/202466
- DOI: https://doi.org/10.1134/S1061933X18010064
- ID: 202466
Cite item
Abstract
Shear stability of water-in-oil highly concentrated emulsions was characterized by the rate of the droplet size decrease at a constant shear rate. Samples of different concentration (ranging from 0.85 to 0.94 wt %), prepared with different surfactants and three types of oils were analysed. The emulsions under study are visco-plastic media with a clearly expressed yield stress. The usually used Capillary number is not valid for such systems but instead Bingham number (ratio of the yield stress to interfacial forces) was used to characterise their stability. Within the frames of our experiment, it has been proven that the correlation between shear stability of emulsions and the Bingham number exists.
About the authors
I. Masalova
Flow Process and Rheology Centre, Engineering Faculty
Author for correspondence.
Email: masalovai@cput.ac.za
South Africa, Cape Town, 8000
F. Kapiamba
Flow Process and Rheology Centre, Engineering Faculty
Email: masalovai@cput.ac.za
South Africa, Cape Town, 8000
N. Tshilumbu
Flow Process and Rheology Centre, Engineering Faculty
Email: masalovai@cput.ac.za
South Africa, Cape Town, 8000
A. Ya. Malkin
Topchiev Institute of Petrochemical Synthesis
Email: masalovai@cput.ac.za
Russian Federation, Moscow, 119991
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