[HTML][HTML] High fidelity modeling of thermal relaxation and dissociation of oxygen

DA Andrienko, ID Boyd - Physics of Fluids, 2015 - pubs.aip.org
A master equation study of vibrational relaxation and dissociation of oxygen is conducted
using state-specific O 2–O transition rates, generated by extensive trajectory simulations …

Vibrational-Specific Model of Simultaneous and Relaxation Under Postshock Conditions

AJ Fangman, DA Andrienko - Journal of Thermophysics and Heat …, 2022 - arc.aiaa.org
The present paper discusses the development of an aerothermochemistry model that can be
efficiently coupled with fluid dynamics simulations and retains the accuracy of the quantum …

Assessment of vibration–dissociation coupling models for hypersonic nonequilibrium simulations

J Hao, J Wang, C Lee - Aerospace Science and Technology, 2017 - Elsevier
The fidelity of three widely-used two-temperature vibration–dissociation coupling models,
including the Park model (1988), the Macheret–Fridman model (1994), and the coupled …

State-specific simulation of oxygen vibrational excitation and dissociation behind a normal shock

J Hao, J Wang, C Lee - Chemical Physics Letters, 2017 - Elsevier
A complete vibration–vibration–translation (V–V–T) bound–bound transitions rates database
for O 2–O 2 collisions is generated using the forced harmonic oscillator (FHO) model with …

Numerical investigation of oxygen thermochemical nonequilibrium on high-enthalpy double-cone flows

J Hao, CY Wen - International Journal of Heat and Mass Transfer, 2018 - Elsevier
Hypersonic thermochemical nonequilibrium flows over a double-cone configuration are
numerically investigated. Simulations with oxygen as the test gas are performed using …

Uncertainty quantification in state-specific modeling of thermal relaxation and dissociation of oxygen

X Wang, Q Hong, C Yang, Q Sun - AIAA Journal, 2023 - arc.aiaa.org
THE high temperatures in hypersonic flows induce many com-plicated physical and
chemical processes, such as vibrational and electronic energy excitation, dissociation of …

Multitemperature Dissociation Rate of Calculated Using Selective Sampling Quasi-Classical Trajectory Analysis

S Voelkel, PL Varghese, V Raman - Journal of Thermophysics and Heat …, 2017 - arc.aiaa.org
The dissociation rate of nitrogen for the reaction N 2+ N 2→ N 2+ N+ N was calculated as a
function of a translational, vibrational, and rotational temperature, each ranging from 6000 to …

Comparison of DSMC reaction models with QCT reaction rates for nitrogen

IJ Wysong, SF Gimelshein - AIP Conference Proceedings, 2016 - pubs.aip.org
Four empirical models of chemical reactions extensively used in the direct simulation Monte
Carlo method in the past are analyzed via comparison of temperature and vibrational level …

Maximum entropy modeling of oxygen vibrational excitation and dissociation

J Hao, CY Wen - Physical Review Fluids, 2019 - APS
The vibrational excitation and dissociation of oxygen are modeled using different
approaches with a range of fidelity, including the conventional two-temperature model, the …

Experimental and Computational Assessment of O2 and NO Individual Vibrational States in Reflected Shock Flows

D Andrienko, ID Boyd, JW Streicher… - AIAA SCITECH 2025 …, 2025 - arc.aiaa.org
This paper investigates the kinetics of nitric oxide and molecular oxygen under
nonequilibrium conditions observed in the relaxation zone behind an air shock. We focus on …