Abstract:
Calculation is carried out of non-equilibrium fluctuations in the Boltzmann gas on
ihe basis of the equation for smoothed distribution function for all particles of the
system. This equation implies the chain of equations for distribution function obtained
earlier in the works [1, 2, 4].
The calculation is also performed of the space-time spectral function of particle
density fluctuations in phase space for weakly non-stationary and weakly non-homogeneous
gas states, taking into account the “polarization” effects due to collective motion
of atoms.
It is shown that slow (in the periods of the free run order) fluctuations give rise
to additional contribution into kinetic equation and to corresponding changes in gas
dynamics equations.
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