, Volume 32, Issue 4, pp 455-465

Method of most probable distribution: New solutions and results

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Abstract

The variational conditions implied by the most probable equilibrium distribution for a dilute gas are set up exactly in terms of the digamma function without necessarily invoking a Stirling approximation. Through a sequence of lemmas it is proved that, at any given kinetic temperature, there are three classes of self-consistent solutions characterized by the parameterβ \( \beta \bar \gtrless 0 \) 0 and by non-Maxwellian tails. These ambiguities persist even for a free ideal gas.