Physico-Mathematical Models of Relaxing Molecular Gas Flows

  • Yurii N. GrigoryevEmail author
  • Igor V. Ershov
Part of the Fluid Mechanics and Its Applications book series (FMIA, volume 117)


The chapter has an introductory character and provides some auxiliary material to give an idea of notions and results of physical kinetics, kinetic theory, and acoustics of molecular gases, which are used in the book. The main goal of this chapter is to demonstrate the feasibility and adequacy of physical and mathematical models used in the authors’ researches. In particular the evolution of the concept of bulk viscosity in mechanics and kinetic theory of gases is briefly described. Qualitative properties of the Landau-Teller relaxation equation for the vibrational mode energy, which plays a key role in subsequent considerations, are discussed. The physical mechanism of dissipation of acoustic waves on the background of the relaxation process in a thermally nonequilibrium molecular gas is explained.


Kinetic Theory Vibrational Energy Bulk Viscosity Vibrational Level Vibrational Relaxation 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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© Springer International Publishing AG 2017

Authors and Affiliations

  1. 1.Institute of Computational TechnologiesRussian Academy of SciencesNovosibirskRussia

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