Abstract
Numerical calculation was carried out to pursue loci of ten circles that had momentum after placed in the closed space. The velocity distribution of them approached to the Maxwellian distribution curve. The distribution of free paths also agreed with the theoretical curve derived from the kinetic theory of gases. Then the “phases” of circles, namely the gaseous phase and the solid phase were defined and transition rules between the two phases were assumed. The growth of a solid cluster could be simulated with statistically reproducible properties that were independent of trials in statistically same conditions. But it was impossible to simulate temperature-dependent properties of nucleation process because of the simplicity of the authors' model.
