Title :
On electrocoalescence of water droplets in an insulating liquid
Author_Institution :
CNRS Lab. d´´Electrostatique et de Materiaux Dielectriques, Grenoble, France
Abstract :
The basic processes leading to coalescence of small droplets of conducting water dispersed in an insulating liquid are examined in the case of an emulsion flowing between two coaxial cylindrical electrodes and subjected to an electric field. The formula giving the interaction force between two droplets and the equation governing the evolution of a polydispersed emulsion are first recalled. Expressions are derived for the coalescence rate when only the field-induced interaction between droplets is retained, and the characteristic coalescence time is estimated. It is proposed that the shear rate plays a major role in bringing the droplets into contact.<>
Keywords :
drops; electrodes; electrohydrodynamics; emulsions; shear flow; EHD; coaxial cylindrical electrodes; conducting water; electric field; electrocoalescence; electrohydrodynamics; emulsion; insulating liquid; interaction force; shear rate; water droplets; Coaxial components; Corrosion; Dielectric liquids; Dielectrics and electrical insulation; Electrodes; Equations; Kinetic theory; Lead; Petroleum industry; Sediments;
Conference_Titel :
Industry Applications Society Annual Meeting, 1992., Conference Record of the 1992 IEEE
Conference_Location :
Houston, TX, USA
Print_ISBN :
0-7803-0635-X
DOI :
10.1109/IAS.1992.244253
