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A computational study of the coalescence process between a drop and an interface in an electric field

A computational study of the coalescence process between a drop and an interface in an electric field

Category
Academic lecture
Abstract
The coalescence process between a drop and an interface may not be instantaneous, but result in the creation of a smaller secondary drop. This process may be repeated several times before the coalescence is complete. Experiments have shown that an electric field can suppress thisphenomenon and give coalescence in a single stage. In this paper, the influence of an electric field on the partial coalescence process is studied using numerical simulations. The results show that higher electric Bond numbers reduce the time from pinch-off of a secondary drop to recoalescence, and eventually give single-staged coalescence. A single-stage coalescence event is presented in detail, and the mechanism producing it discussed. The results support arguments from the literature that single-staged coalescence is caused by an increased downward momentum due to electrostatic attraction.
Language
English
Affiliation
  • SINTEF Energy Research / Gassteknologi
Presented at
CFD2008 - 6th International Conference on Computational Fluid Dynamics in the Oil & Gas, Metallurgical and Process Industries
Place
Trondheim
Date
10.06.2008 - 12.06.2008
Organizer
SINTEF, NTNU, CSIRO
Year