Chemical Relaxation with Preferential Dissociation from Excited Vibrational Levels

Autor:	Paul V. Marrone, Charles E. Treanor
Rok vydání:	1963
Předmět:	Shock wave Physics Argon Anharmonicity General Engineering chemistry.chemical_element Oxygen Dissociation (chemistry) Exponential function Reaction rate constant chemistry Excited state Physics::Atomic and Molecular Clusters Physics::Chemical Physics Atomic physics
Zdroj:	Physics of Fluids. 6:1215
ISSN:	0031-9171
DOI:	10.1063/1.1706888
Popis:	The rate of molecular dissociation behind strong shock waves is calculated with the assumption that dissociation can occur preferentially from the higher vibrational levels. An exponential probability of dissociation from the various vibrational levels is employed using an anharmonic oscillator model. Results for the dissociation of oxygen in an argon diluent are presented. Vibrational non‐equilibrium introduces a T−3 temperature dependence into the oxygen dissociation rate constant in the range 4000°–8000°K. A dissociation lag‐time of the order of the extrapolated vibrational relax ation time is predicted immediately behind the shock front. The computed results are shown to be in agreement with available experimental results.
Databáze:	OpenAIRE
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