First-principles predictions for shear viscosity of air components at high temperature

P Valentini, AM Verhoff, MS Grover… - Physical Chemistry …, 2023 - pubs.rsc.org
The direct molecular simulation (DMS) method is used to obtain shear viscosity data for non-
reacting air and its components by simulating isothermal, plane Poiseuille subsonic flows …

Exhaustive State-to-State Cross Sections and Rate Coefficients for Inelastic N2–N2 Collisions using QCT Combined with Neural Network Models

CM Guo, H Zhang, XL Cheng - The Journal of Physical Chemistry …, 2024 - ACS Publications
Using the quasi-classical trajectory method, we systematically studied the state-to-state
vibrational relaxation process of N2 (v 1)+ N2 (v 2) collisions over a wide temperature range …

Direct molecular simulation of oxygen dissociation across normal shocks

E Torres, TE Schwartzentruber - Theoretical and Computational Fluid …, 2022 - Springer
We present direct molecular simulations (DMSs) of rovibrational excitation and dissociation
of oxygen across normal shock waves. These are the first atomistic simulations of normal …

Toward ab initio molecular simulation of reacting air: Mach 15 air flow over a blunt wedge

P Valentini, MS Grover, NJ Bisek - Journal of Fluid Mechanics, 2024 - cambridge.org
We present a Mach 15 air flow over a blunt two-dimensional wedge simulated using the
direct molecular simulation method. As electronically excited states are not modelled, the …

Near-continuum, hypersonic oxygen flow over a double cone simulated by direct simulation Monte Carlo informed from quantum chemistry

P Valentini, MS Grover, AM Verhoff… - Journal of Fluid …, 2023 - cambridge.org
A large-scale, fully resolved direct simulation Monte Carlo (DSMC) computation of a non-
equilibrium, reactive flow of pure oxygen over a double cone is presented. Under the …

[HTML][HTML] Thermochemical non-equilibrium flow characteristics of high Mach number inlet in a wide operation range

DAI Chunliang, SUN Bo, YUE Lianjie… - Chinese Journal of …, 2023 - Elsevier
The high-temperature non-equilibrium effect is a novel and significant issue in the flows over
a high Mach number (above Mach 8) air-breathing vehicle. Thus, this study attempts to …

High-Energy Reaction Dynamics of N3

JC Wang, JC San Vicente Veliz… - The Journal of Physical …, 2024 - ACS Publications
The atom-exchange and atomization dissociation dynamics for the N (4S)+ N2 (1Σg+)
reaction are studied using a reproducing kernel Hilbert space (RKHS)-based, global …

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 …

Molecular diffusion of mass and energy predicted by ab initio potential energy surfaces for air components at high temperatures

P Valentini, MS Grover, NJ Bisek - Physical Review Fluids, 2024 - APS
The thermal conductivity and self-diffusion coefficients for molecular nitrogen and oxygen
are investigated with the direct molecular simulation (DMS) technique using high-fidelity, ab …

Transport cross sections and collision integrals for C+ (2P)–H (2S), C (3P)–H+ (1S), C (1D)–H+ (1S), and C+ (4P)–H (2S) interactions

Z Hou, Z Qin, L Liu - Physics of Fluids, 2023 - pubs.aip.org
Transport collision integrals of interacting atoms or ions play a crucial role in modeling
transport properties of high-temperature gases and plasmas. Here, we obtained the …