Vibration-to-translation energy transfer in atmospheric-pressure streamer discharge in dry and humid air

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Abstract

Vibration-to-translation (VT) energy transfer in atmospheric-pressure streamer discharge is numerically simulated using a two-dimensional electro-hydrodynamic model. The model includes state-to-state vibrational kinetics in humid air and is coupled with the compressible flow equation of the gas fluid. The vibrational distribution of OO2(v) reaches equilibrium more quickly than that of NO2 (v), whereas the energy released from OO2(v) does not increase the gas temperature. In humid air, the decay rate of the vibrational energy of NO2 (v) is accelerated by the VT energy transfer through water molecules and the energy heats the gas. However, the increase in gas temperature due to VT energy transfer is not always seen because it competes with thermal diffusion.

Original languageEnglish
Article number055020
JournalPlasma Sources Science and Technology
Volume24
Issue number5
DOIs
Publication statusPublished - 2015 Sep 15

Keywords

  • numerical simulation
  • streamer discharge
  • vibrational temperature

ASJC Scopus subject areas

  • Condensed Matter Physics

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