High-Temperature Thermodynamic Properties of Mars-Atmosphere Components

Abstract

Methods of calculation of high-temperature thermodynamic properties for some selected Mars-atmosphere components in the temperature range from 200K to 50000K and results are discussed and compared with previous works. Aspects such as quasi-bound rotational states, cutoff criteria, autoionizing states are considered. Examples of tables are provided.

Experimental investigation and modelling of double pulse laser induced plasma spectroscopy under water

“…From the gas composition, the mean molecular mass and the internal energy per mass unit can be determined and then inserted in the equations describing the equilibrium flows. In the calculation of partition functions, the effects of quasibound vibro-rotational states, energy-level completion of the monatomic components, and auto-ionizing states have been introduced too [36]. All the equilibrium constants corresponding to the chemical reactions (a -u) at the total pressure of 0.5 atm are reported in Fig.…”

Eucken correction in high-temperature gases with electronic excitation

“…In computational fluid dynamics, it is more efficient to use polynomial fits provided in Ref. 23 for the internal specific heats.…”

“…According to the cut-off criterion for atomic partition functions, 23 we take into account 170 and 204 excited electronic states for N and O atoms, respectively. For molecular species, we consider 5 and 7 electronic states in N 2 and O 2 .…”

Calculating High-Temperature Thermodynamic Properties of Diatomics in Air: Evaluation and Accuracy Assessment

“…(8). In contrast, the state sum method requires solution of the Schroedinger equation for each of the bound-state potential curves in order to obtain sets of rotational-vibrational energies.…”

“…This procedure includes states with energy above the j=0 dissociation limit. Quantum mechanically these states decay slowly by tunneling, but are here and elsewhere treated as bound states 8,9 . With Eqs (1) and (2) (3)…”