Abstract
In this work, an AW (Air Wave) type EHD pump was examined, where the electrode system consists of a wire electrode in gas-phase and a partially immersed plate electrode inclined to the gas-liquid interface. This type of non-intrusive/non-moving component pump is normally used for the transport of hazardous liquid from containers or for the cleanup of spilled hazardous liquids. The EHD liquid pumping phenomenon was generated on the inclined plate electrode surface near the gas-liquid interface exposed to gas-phase corona discharges. The measurements of liquid flow towards the plate electrode surface were conducted by PIV. The fundamental characteristics of the two-phase EHD pump such as time-averaged liquid pumping flow rate, time-averaged current and internal liquid flow distribution for DC applied voltage were experimentally investigated in detail. The pumping performance was characterized by corona discharge induced dielectric EHD and conductive EHD, fluid viscous and gravity forces in terms of dimensionless parameters.
