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Abstract <p>Air relaxation in the afterglow of a pulsed DC discharge is simulated using the state-to-state approach and two kinetic schemes. Good agreement of the results with experiment is shown. Key factors affecting the accuracy of the simulation are identified: consideration of vibrational nonequilibrium in all molecular species, the exchange Zeldovich reaction model, and the model for vibrational energy exchanges. A reduced kinetic scheme is developed that speeds up calculations by a factor of 37&#xa0;while maintaining accuracy. The proposed model is applicable in a wide range of temperatures and nonequilibrium parameters.</p>

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Validation of State-to-State Models of Vibrational–Chemical Kinetics in the Problem of Air Relaxation in the Afterglow

  • 期刊论文

  • 发表日期：

    2025年12月1日

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  • M. Yu. Melnik,
  • A. A. Kashubo,
  • E. V. Kustova

摘要

Abstract

Air relaxation in the afterglow of a pulsed DC discharge is simulated using the state-to-state approach and two kinetic schemes. Good agreement of the results with experiment is shown. Key factors affecting the accuracy of the simulation are identified: consideration of vibrational nonequilibrium in all molecular species, the exchange Zeldovich reaction model, and the model for vibrational energy exchanges. A reduced kinetic scheme is developed that speeds up calculations by a factor of 37 while maintaining accuracy. The proposed model is applicable in a wide range of temperatures and nonequilibrium parameters.