Abstract
A recent paper has described extensions of the Cercignani–Lampis scattering kernel to cover (i) diffuse scattering with partial accommodation of translational kinetic energy and (ii) accommodation of vibrational energy of a diatomic molecule modelled as a rigid rotor/harmonic oscillator. The models are here further extended to cover the cases of partially diffuse scattering and of the anharmonic oscillator model of molecular vibration. The new models, like the old, satisfy detailed balance or reciprocity, thereby ensuring the preservation of an equilibrium distribution, and can be conveniently implemented in direct simulation Monte Carlo calculations. The results of some calculations are presented.
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