PIV measurements on charged plumes-influence of SiO2 seeding particles on the electrical behavior

• Published in: IEEE transactions on dielectrics and electrical insulation Vol. 16; no. 2; pp. 335 - 342
• Main Authors: Daaboul, M., Louste, C., Romat, H.
• Format: Journal Article
• Language: English
• Published: New York IEEE 01.04.2009; The Institute of Electrical and Electronics Engineers, Inc. (IEEE); Institute of Electrical and Electronics Engineers
• Subjects: Blade-plane geometry; charged plume; Current measurement; dielectric liquid; Dielectric liquids; Electrohydrodynamics; Engineering Sciences; Fluid mechanics; Fluids mechanics; Glass; Isothermal processes; Layout; Mechanical variables measurement; Mechanics; particle image velocimetry; Particle measurements; Physics; Space charge; Spatial resolution
• ISSN: 1070-9878; 1558-4135
• DOI: 10.1109/TDEI.2009.4815161

It is well known that an isothermal dielectric liquid can be driven by electroconvection. It has been demonstrated that two phenomena could generate space charge in isothermal dielectric liquids and then induce a fluid movement. These two electroconvective effects are bulk conduction and ion injection. In order to improve the performance of electroconvective devices, the velocity of the flows must be recorded as accurately and precisely as possible. In this paper, the particle image velocimetry (PIV) method that was originally developed in the field of experimental fluid mechanics is adapted to electroconvective flow measurements. The choice and the size of seeding particles are discussed. The influence of the seeding particles density on the current is measured. In this work, experiments were investigated on a typical two-dimensional charged plume flow produced between a blade and a flat plate. Both negative and positive polarities are also investigated.