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ELECTRO-HYDRODYNAMICS ANALYSIS OF COROTRONS
P. Zamankhan, G. Ahmadi and F-G. Fan Center for Advanced Materials Processing Clarkson University, Potsdam, NY Xerox Corporation, Webster, NY
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Electrical Potential Distribution Charge Density Distribution
Outline Corona Phenomenon Corotron Description Electrical Potential Distribution Charge Density Distribution Flow Field Results Conclusions
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Corotron Lateral view Side view
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Corotron over a Moving Dielectric Substrate
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Objectives of the Computational Model
Electrical quantities Amount of surface charge (voltage) on the substrate Flow field calculations Contamination analysis Environmental concerns Ion transportation (corona wind) Cavity flow +
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Substrate Surface Charge (Voltage) Distribution
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Electrical Potential Distribution
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Effect of Wire Voltage, and The Substrate
Speed on Electrical Potential Distribution Voltage=4500 Volts Voltage=6000 Volts Speed =0.25 m/s
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Charge Density Distribution
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Charge Density Distribution
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Effect of Wire Voltage, and The Substrate
Speed on Charge Density Distribution Voltage=6000 Volts Speed =0.25 m/s Voltage=4500 Volts
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Flow Field Results-Corona Wind
Voltage=4500 Volts
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Flow Field Results-Corona Wind
Voltage=6000 Volts
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Flow Field Results-Corona Wind
Speed=0.25 m/s
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Variation of Substrate Voltage Distribution
V=6000 Volt V=4500 Volt U=0.5 m/s U=0.25 m/s d=5.3 mm d=2 mm
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Charging of substrate under various conditions is analyzed.
Conclusions Numerical simulations of 3D Electrohydrodynamics in corotrons were performed. Charging of substrate under various conditions is analyzed. The computational model provides a tool for optimization of design of corotrons.
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