State-to-state models of vibrational relaxation in Direct Simulation Monte Carlo (DSMC)

10th International Conference on Aerophysics and Physical Mechanics of Classical and Quantum Systems

物理学;力学

Oblapenko, G.P.^1 ; Kashkovsky, A.V.^2 ; Bondar, Ye A.^1,2

Saint-Petersburg State University, 7/9 Universitetskaya nab., St.Petersburg

199034, Russia^1

Institute of Theoretical and Applied Mechanics, 4/1 Institutskaya ul., 630090, Russia^2

关键词: Direct simulation Monte Carlo;    Harmonic oscillators;    Inverse Laplace transform;    Larsen Borgnakke model;    Quasi-classical-trajectory calculations;    State modeling;    Vibrational energies;    Vibrational relaxation;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/815/1/012011/pdf
DOI  :  10.1088/1742-6596/815/1/012011

学科分类：力学，机械学

来源: IOP

【 摘 要 】

In the present work, the application of state-to-state models of vibrational energy exchanges to the Direct Simulation Monte Carlo (DSMC) is considered. A state-to-state model for VT transitions of vibrational energy in nitrogen and oxygen, based on the application of the inverse Laplace transform to results of quasiclassical trajectory calculations (QCT) of vibrational energy transitions, along with the Forced Harmonic Oscillator (FHO) state-to-state model is implemented in DSMC code and applied to flows around blunt bodies. Comparisons are made with the widely used Larsen-Borgnakke model and the in uence of multi-quantum VT transitions is assessed.