Existence of homoenergetic affine flows for the Boltzmann equation

  title={Existence of homoenergetic affine flows for the Boltzmann equation},
  author={Carlo Cercignani},
  journal={Archive for Rational Mechanics and Analysis},
An existence theorem is proved for homoenergetic affine flows described by the Boltzmann equation. The result complements the analysis of Truesdell and of Galkin on the moment equations for a gas of Maxwellian molecules. Existence of the distribution function is established here for a large class of molecular models (hard sphere and angular cut-off interactions). Some of the data lead to an implosion and infinite density in a finite time, in agreement with the physical picture of the associated… CONTINUE READING