TY - GEN
T1 - A state-resolved dsmc recombination model using orbiting cross-sections from the o3 potential energy surface
AU - Pan, Tzu Jung
AU - Kondur, Chaithanya
AU - Subramaniam, Sharanya
AU - Stephani, Kelly A.
N1 - Publisher Copyright:
© 2019, American Institute of Aeronautics and Astronautics Inc, AIAA. All rights reserved.
PY - 2019
Y1 - 2019
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=85083943495&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85083943495&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:85083943495
SN - 9781624105784
T3 - AIAA Scitech 2019 Forum
BT - AIAA Scitech 2019 Forum
PB - American Institute of Aeronautics and Astronautics Inc, AIAA
T2 - AIAA Scitech Forum, 2019
Y2 - 7 January 2019 through 11 January 2019
ER -