Kinetics of charging of drops formed from a stimulated jet of conducting liquid

Author

Oliveri, Salvatore ; Atten, Pierre

Author_Institution

Lab. d´´Electrostatique et de Materiaux Dielectriques, Univ. Joseph Fourier, Grenoble, France

fYear

1992

fDate

4-9 Oct. 1992

Firstpage

1374

Abstract

The capillary instability of a circular liquid jet leads to the formation of liquid drops. By imposing a suitable initial perturbation it is possible obtain identical drops. In the case of an electrically conducting liquid, these drops can be individually and differently charged and subsequently separated by a constant electric field. For charging, one electrode is the conducting jet itself, connected to ground by the tank, and the other one is assumed here to be a coaxial metallic cylinder. The authors focus mainly on the kinetics of charging when a step voltage is applied to the external cylindrical electrode. A model that predicts the potential of the drop versus time after application of a voltage step, for a given shape of the jet is proposed. The time required for fully charging a drop is evaluated, and the influence of a delay in the application of charging voltage is examined.<>

Keywords

drops; electrohydrodynamics; electrostatics; jets; EHD; capillary instability; charging; circular liquid jet; coaxial metallic cylinder; conducting liquid; delay; drops; electric field; electrode; electrohydrodynamics; electrostatics; kinetics; model; perturbation; step voltage; stimulated jet; Capacitance; Capacitors; Delay; Electric potential; Electrodes; Equations; Ink jet printing; Kinetic theory; Shape; Voltage;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/IAS.1992.244258

Filename

244258