Photophoresis of a fine particle in a selectively excited gas.

Motion in a binary gas mixture of a fine particle affected by resonant optical radiation is considered. The Doppler effect leads to the velocity-selective absorption of the traveling light wave by molecules of one of the gas components. Radiation transfers the absorbing molecules from the ground state to excited ones.

Light-induced evaporation and condensation growth of aerosol particles.

The nonisothermal evaporation and condensation of a particle suspended in a vapor-gas mixture under the effect of resonant optical radiation is studied. A traveling light wave is absorbed by the aerosol particle and velocity selectively by vapor molecules. The dependence of the evaporation or condensation rate on optical and thermophysical properties of the particle and gaseous molecules is studied.