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When exposed to a corona discharge, a dielectric droplet spreads over a grounded substrate. In the present work, the spreading of dielectric liquids subjected to a short-term exposure is investigated. A simple theoretical model was developed to find the spreading law at the very beginning of exposure. The asymptotic approximation for the surface charge density and the interfacial pressure showed that...
This paper presents the development of an electrohydrodynamic conduction micropump using Printed circuit board/liquid crystal polymer MEMS technology. One of the most important parameter for designing this kind of pump is the level of applied voltage. In the last investigations, the distance between high voltage electrode and ground electrode was fixed in few millimeters. In this work, the distance...
In the present work, the corona discharge was established with heated horizontal isothermal cylinder electrode as a ground electrode and axial razor placed below the cylinder as a high voltage electrode in atmospheric pressure air. Thermal boundary layer visualized using 100 mm optical plate Mach-Zehnder interferometer. The test was started from near the onset corona voltage applied to the razor and...
In the microgravity condition, circulation of liquids with low level of power consumption is extremely attractive. Electrohydrodynamic pumps generate significant pressure heads with low level of power consumption, simple design, low vibration, and acoustic noise. Moreover, the appropriate electrohydrodynamic pressure heads can be achieved easily with variation of applied voltage. Among the electrohydrodynamic...
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