Flow distribution and pressure of air due to ionic wind in pin-to-plate corona discharge system

H. Kawamoto*, H. Yasuda, S. Umezu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

46 Citations (Scopus)


An electrohydrodynamic investigation has been carried out in a pin-to-plate gas discharge system to clarify the mechanism of repulsive force generation between a pin and plate electrode at corona discharge. Numerical calculations have been conducted in two steps. First, the axi-cylindrical static corona discharge field was calculated with the finite-element method to deduce the Coulombic body force ρ E applied to the air, where ρ is the charge density and E is the electric field, and then the induced ionic wind was calculated with the finite differential method. The calculated pressure distribution on the plate electrode was on the order of 10 Pa which was in good agreement with the measured pressure distribution. The calculated air velocity at the center was several m/s and was confirmed by a time-of-flight experiment and the velocity distribution near the pin electrode also agreed with measurements using a laser Doppler velocimeter. Pressure and wind velocity were increased at high-applied voltage. These results confirm that the ionic wind is the cause of the repulsive force to the pin electrode at the corona discharge.

Original languageEnglish
Pages (from-to)400-407
Number of pages8
JournalJournal of Electrostatics
Issue number6
Publication statusPublished - 2006 Jun


  • Corona discharge
  • Electrohydrodynamics
  • Ionic wind

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Biotechnology
  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Electrical and Electronic Engineering


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