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Study on Discharge Process of Discrete Water Drops on the Hydrophobic Surface in Non-uniform Electric Field

According to simulating tests on the model sample combining with ANSYS finite elements analysis software,the discharge process of discrete water drops on the hydrophobicity surface in non-uniform electric field was studied and computed.1The results show that the discharge is caused by partial arc connection developed from both ends to electrodes to center and exist visible extinguishing and rekindling phenomena.The electric field distribution variation along the hydrophobic surface having one or more water drops or no water drops.The electric field along hydrophobic surface without water drops has a U-shape distribution with high electric stress at both ends of electrode,13.19 kV/cm maximum.The highest electric stress on single water drop appears at peak,13.9 kV/cm maximum,1and the lowest electric stress falls in drop surface,10.35 kV/cm approximately.Field non-uniformity rises in case at presence of discrete water drops with highest stress of 4.6 kV/cm existing on nearest side of water drops adjacent to both electrodes,the stresses at other zones are moderate.The computation result shows that the maximum electric field intensity at presence of water drops is 1.22～1.44 times higher than that without water drops.