A simple structured liquid pump based on the electrohydrodynamic flow was developed. The structure of a developed pump is a plastic pipe with electrodes on the both sides. The needle electrode partially covered with a plastic film forms the anode and the disc electrode with a hole at the center forms the cathode. The hole is connected to the outlet tube. Though the field of application of this pump is limited, as it is only workable in the insulating oil under high D. C. voltage, its structure is so simple that it is easily fabricated and the multiple configuration is straightforward to increase the power.
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