1971 Volume 4 Issue 2 Pages 188-191
Mass transfer between infinite parallel plates under vacuum was treated by analyzing the Boltzmann equation with the two-sided Maxwellian velocity distribution function of molecules. The equation obtained from this analysis coincides completely with that derived from the "series-resistance model'' of the resistances of evaporation, condensation and diffusion. The results were compared with the theoretical results obtained by Uyeha et al. in 1960.