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- Title
The effect of changing interfacial tension on electrohydrodynamic processes in two-phase immiscible liquids.
- Authors
Chirkov, Vladimir; Utiugov, Grigorii; Blashkov, Ilia; Vasilkov, Sergei
- Abstract
The interfacial tension is a crucial property of two-phase immiscible liquid. However, many researchers are not aware about the fact that its value is far from being constant for many pairs of liquids. The paper presents the measurements of interfacial tension time-dependencies for various oils against distilled water and assesses how it affects electrohydrodynamic processes in two-phase immiscible liquids. Primary results were obtained using an optical tensiometer (the pendant drop method). Further on, several computations of droplet electrodeformation were performed and compared to the relevant experimental data to independently check the reliability of the measurements. It was found that the decrease with time of the interfacial tension against water is specific for a lot of liquids, in particular, for many vegetable oils and even for transformer oils after it being used in power transformers. The change of the interfacial tension with time is shown to be a realistic cause for the emergence of the so-called cone-dimple mode of electrocoalescence, which was earlier reported in experimental studies. The paper includes experimentally measured properties (that need to be specified in numerical models) for many liquids.
- Subjects
ELECTROHYDRODYNAMICS; PLASMA gases; ARGON; POWER resources; ENERGY industries
- Publication
International Journal of Plasma Environmental Science & Technology (IJPEST), 2023, Vol 17, Issue 3, p1
- ISSN
1881-8692
- Publication type
Article
- DOI
10.34343/ijpest.2023.17.e03003