The Boltzmann equation and corresponding extremal problems

Details The Boltzmann equation and corresponding extremal problems The Boltzmann equation and corresponding extremal problems

2011-06-15

arxiv.org/abs/1106.3254v1

Physics

Mathematical Physics

Scientific paper

We start with some global Maxwellian function $M$, which is a stationary solution (with the constant total density $\rho$) of the Boltzmann equation, and we denote the number of the corresponding space variables by $n$. The notion of distance between the global Maxwellian function and an arbitrary solution $f$ (with the same total density $\rho$ at the fixed moment $t$) of the Boltzmann equation is introduced. In this way we essentially generalize the important Kullback-Leibler distance, which was used before. An extremal problem to find a solution of the Boltzmann equation, such that $\dist\{M,f\}$ is minimal in the class of solutions with the fixed values of energy and of $n$ moments, is solved.

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