Abstract:
Analytical expressions determining the velocity distribution function of evaporating particles were obtained for evaporation into a vacuum. The formulas are compared with numerical simulation results;
the coincidence can be treated as sufficiently good.
The particle distribution function over the longitudinal, i.e., directed from evaporation surface, velocity turns out to be significantly non-Maxwellian. The distribution function over the transverse projections of the velocity is Maxwellian but with a distribution modulus different from the evaporating liquid temperature $T$. The mean energy of a particle escaping from the surface is $2kT$.
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