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Level Adiabatic Model for the Dissociation of Diatomic Molecules

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Abstract

In strong shock waves in rarefied gases chemical processes occur under conditions of thermodynamic nonequilibrium. Of great interest is the creation of level models of processes to obtain a rate coefficient. The work presents a new level model for dissociation, obtained within the adiabatic approximation. The model is verified on the basis of available data of quasiclassical trajectory calculations, which analyze the dissociation of N2 molecules in a wide temperature range. Comparison of the model with the Treanor–Marrone model and with existing modifications of the Treanor–Marrone model are discussed.

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Funding

The work was carried out in accordance with the research plan of Moscow State University Mechanics Research Institute with partial financial support of the Russian Foundation for Basic Research within the framework of scientific project no. 18-01-00741A.

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Authors and Affiliations

  1. Institute of Mechanics, Lomonosov Moscow State University, 119192, Moscow, Russia

    G. D. Smekhov, A. L. Sergievskaya, M. Yu. Pogosbekian & A. A. Kroupnov

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  1. G. D. Smekhov
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  2. A. L. Sergievskaya
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  3. M. Yu. Pogosbekian
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  4. A. A. Kroupnov
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Corresponding authors

Correspondence to A. L. Sergievskaya or M. Yu. Pogosbekian.

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The authors declare that they have no conflicts of interest.

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Translated by N. Petrov

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Smekhov, G.D., Sergievskaya, A.L., Pogosbekian, M.Y. et al. Level Adiabatic Model for the Dissociation of Diatomic Molecules. Fluid Dyn 58, 796–810 (2023). https://doi.org/10.1134/S0015462823601079

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