Moment inequalities and high-energy tails for the Boltzmann equations with inelastic interactions

Details Moment inequalities and high-energy tails for the Boltzmann equations with inelastic interactions Moment inequalities and high-energy tails for the Boltzmann equations with inelastic interactions

2003-06-03

arxiv.org/abs/math-ph/0306014v2

Physics

Mathematical Physics

22 pages

Scientific paper

10.1023/B:JOSS.0000041751.11664.

We study the high-energy asymptotics of the steady velocity distributions for model systems of granular media in various regimes. The main results obtained are integral estimates of solutions of the hard-sphere Boltzmann equations, which imply that the velocity distribution functions $f(v)$ behave in a certain sense as $C\exp(-r|v|^s)$ for $|v|$ large. The values of $s$, which we call {\em the orders of tails}, range from $s=1$ to $s=2$, depending on the model of external forcing. The method we use is based on the moment inequalities and careful estimating of constants in the integral form of the Povzner-type inequalities.

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