A state-resolved dsmc recombination model using orbiting cross-sections from the o3 potential energy surface

Tzu Jung Pan, Chaithanya Kondur, Sharanya Subramaniam, Kelly A. Stephani

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A state-resolved recombination model is developed for direct simulation Monte Carlo method with a rovibrational database of collision cross-sections. The recombination is treated through a two-step binary interaction process, including orbiting-pair formation followed by subsequent stabilization involving a third body collision. The cross-section of the orbiting-pair formation and its lifetime are evaluated from the potential energy surface. This determines dissociation/recombination probabilities exclusively from cross-sections, rather than from equilibrium rate coefficients, thus making it more amenable to strong nonequilibrium flows modeled with DSMC. By calibrating the threshold scattering angle to-22.5 rad, the current model can reproduce the equilibrium recombination rate coefficients within the temperature range from T =3000K to 8000K. Good agreement between the current work and the previous model1 in the rovibrational heating and cooling relaxation processes is found.

Original languageEnglish (US)
Title of host publicationAIAA Scitech 2019 Forum
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
ISBN (Print)9781624105784
StatePublished - 2019
EventAIAA Scitech Forum, 2019 - San Diego, United States
Duration: Jan 7 2019Jan 11 2019

Publication series

NameAIAA Scitech 2019 Forum

Conference

ConferenceAIAA Scitech Forum, 2019
Country/TerritoryUnited States
CitySan Diego
Period1/7/191/11/19

ASJC Scopus subject areas

  • Aerospace Engineering

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