An electrical coalescence of conducting droplets is the basis for electrostatic oil cleaning, when tiny water droplets are removed from the dispersion (continuous) medium. However, most studies on the topic treat oil as a perfect dielectric or, at least, disregard dissociation-recombination charged layers near the water-oil interface without appropriate substantiation. The effect of finite (i.e., non-zero) electrical conductivity of oil and dissociation-recombination phenomena in it on the electrical coalescence processes is considered in the present investigation. Two important cases are examined, where oppositely charged ions have equal and different mobilities. In the first case, the threshold electric field strength value, the average electric field strength in the interelectrode space when coalescence of droplets is replaced with non-coalescence, shows a weak decrease compared to the case of dielectric oil. In the latter case, the collision between droplets becomes unlikely due to their translation motion in the same direction and the emergence of electrohydrodynamic jet in the opposite direction behind the droplets.
Original languageEnglish
Title of host publicationProceedings of the 2024 IEEE 5th International Conference on Dielectrics, ICD 2024
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages1-5
Number of pages5
ISBN (Electronic)979-8-3503-0897-6
ISBN (Print)9798350308976
DOIs
StatePublished - 12 Aug 2024
Event5th IEEE International Conference on Dielectrics
- Université Toulouse III - Paul Sabatier, Тулуза, France
Duration: 30 Jun 20244 Jul 2024
https://ieee-icd.org/

Conference

Conference5th IEEE International Conference on Dielectrics
Abbreviated titleICD 2024
Country/TerritoryFrance
CityТулуза
Period30/06/244/07/24
Internet address

    Scopus subject areas

  • Electrical and Electronic Engineering

    Research areas

  • arbitrary Lagrangian-Eulerian method, dissociation-recombination charged layers, electrocoalescence, numerical simulation, two-phase immiscible liquid

ID: 128241279