On the effect of the fugacity on aerosol thermophoresis

The problem of thermophoresis in gases is studied with allowance for phase and (or) other physico-chemical conversions undergone by the particle medium. It is found that these conversions influence the thermophoresis in two ways: firstly, the temperature distribution changes and, secondly, the ambient space is saturated with the vapors of the particle medium, which results in the thermodiffusion of the mixture and uncompensated momentum transfer by the gas molecules. The first effect is more pronounced for low-thermal-conductivity bodies, while the second is especially important for high-thermal-conductivity bodies. The fact that the experimental thermophoresis rate is significantly greater than the theoretical value obtained from the Epstein formula cannot be explained by the phase transition effect.