Direct molecular simulation of internal energy relaxation and dissociation in oxygen

MS Grover, E Torres, TE Schwartzentruber - Physics of Fluids, 2019 - pubs.aip.org
A variant of the direct simulation Monte Carlo (DSMC) method, referred to as direct
molecular simulation (DMS), is used to study oxygen dissociation from first principles. The …

[HTML][HTML] Construction of a coarse-grain quasi-classical trajectory method. I. Theory and application to N2–N2 system

RL Macdonald, RL Jaffe, DW Schwenke… - The Journal of chemical …, 2018 - pubs.aip.org
This work aims to construct a reduced order model for energy transfer and dissociation in
non-equilibrium nitrogen mixtures. The objective is twofold: to present the Coarse-Grain …

Many-Body Permutationally Invariant Polynomial Neural Network Potential Energy Surface for N4

J Li, Z Varga, DG Truhlar, H Guo - Journal of Chemical Theory and …, 2020 - ACS Publications
A potential energy surface (PES) for high-energy collisions between nitrogen molecules is
useful for modeling chemical dynamics in shock waves and plasmas. In the present work …

Direct molecular simulation of nonequilibrium dilute gases

TE Schwartzentruber, MS Grover… - Journal of Thermophysics …, 2018 - arc.aiaa.org
This paper summarizes research performed over the past decade on the direct molecular
simulation of dilute gas flows. Similar to the molecular dynamics method, a potential energy …

[HTML][HTML] Construction of a coarse-grain quasi-classical trajectory method. II. Comparison against the direct molecular simulation method

RL Macdonald, MS Grover… - The Journal of …, 2018 - pubs.aip.org
This work presents the analysis of non-equilibrium energy transfer and dissociation of
nitrogen molecules (⁠ N 2 (Σ g+ 1)⁠) using two different approaches: the direct molecular …

Vibrational Energy Transfer and Collision-Induced Dissociation in Collisions

MS Grover, TE Schwartzentruber, Z Varga… - … of Thermophysics and …, 2019 - arc.aiaa.org
This paper presents molecular dynamics calculations of vibrational energy transfer and
nonequilibrium dissociation in O 2+ O collisions. The O 2+ O interactions are modeled using …

Measurement of radiative non-equilibrium for air shocks between 7-9 km/s

BA Cruden, AM Brandis - 47th AIAA Thermophysics Conference, 2017 - arc.aiaa.org
The present paper describes a recent characterization of thermochemical nonequilibrium for
shock speeds between 7 and 9 km/s in the NASA Ames Electric Arc Shock Tube (EAST) …

Characterization of CO thermochemistry in incident shockwaves

BA Cruden, AM Brandis, ME MacDonald - 2018 Joint Thermophysics …, 2018 - arc.aiaa.org
I. Introduction he atmospheres of Mars and Venus are composed primarily of CO2 with
lesser amounts of N2 and Ar. Vehicles entering these atmospheres encounter significant …

First principles simulation of reacting hypersonic flow over a blunt wedge

MS Grover, AM Verhoff, P Valentini, NJ Bisek - Physics of Fluids, 2023 - pubs.aip.org
This article presents molecular-level analysis of a reactive, near-continuum, Mach 21
nitrogen flow over a blunt wedge using the direct molecular simulation (DMS) method. The …

Comparative analysis of internal energy excitation and dissociation of nitrogen predicted by independently developed ab initio potential energy surfaces

MS Grover, P Valentini, TE Schwartzentruber… - Physical Review …, 2022 - APS
In this article we present a comparative atomic level study analyzing the vibrational
excitation and dissociation of molecular nitrogen due to N 2 (1 Σ g+)+ N (4 S u) and N 2 (1 Σ …